Class 6th Science MCQ
Chapter 9 The Living Organisms And Their Surroundings
Q1. An instrument used for measuring the rate of transpiration is a:
1. Potometer.
2. Klinometer.
3. Hygrometer.
4. Osmometer.
Ans: 1. Potometer.
Explanation:
It is a potometer.
Q2. Which among the following is both producer and carnivorous?
1. Neem.
2. Peepal.
3. Sundew.
4. Mango.
5. None of these.
Ans: 3. Sundew.
Q3. Which pair has not been correctly paired?
1. Camel – Desert.
2. Germs – Air.
3. Polar bear – Snow.
4. Whale – River.
Ans: 4. Whale – River.
Explanation:
Whale is an aquatic animal that lives and breeds in oceans.
Q4. If you happen to go to a desert, what changes do you expect to observe in the urine you excrete? You would:
1. Excrete small amount of urine.
2. Excrete large amount of urine.
3. Excrete concentrated urine.
4. Excrete very dilute urine.
Which of the above would hold true?
1. (i) and (iii)
2. (ii) and (iv)
3. (i) and (iv)
4. (i) and (ii)
Ans: 1. (i) and (iii)
Explanation:
A small amount of concentrated urine would be excreted in desert. This will help conserve water in the body.
Q5. In earthworm the process of breathing occurs:
1. Through its nose.
2. Through its skin.
3. Through its mouth.
4. None of these.
Ans: 2. Through its skin.
Explanation:
Earthworm breathes through its skin.
Q6. Which of the following statements is/ are correct?
1. The body structure of a camel helps it to survive in a desert.
2. The dung of camel is dry.
3. Camels do not sweat.
4. All of the above.
Ans: 4. All of the above.
Q7. Direction: Read the passages given below and answer the questions that follow. Passage. The animals and plants
of deserts live on the desert soil and breathe air from surroundings. In deserts only little water is available. In
deserts days are quite hot and nights are quite cold. Camel:
1. Is a desert animal.
2. Lives in burrows.
3. Both (a) and (b).
4. None of the above.
Ans: 1. Is a desert animal.
Q8. Lamina is:
1. Upper part of pedicel which is wide.
2. A part of stem.
3. Is a type of venation.
4. Broad, flat, green portion of the leaf.
5. None of these.
Ans: 4. Broad, flat, green portion of the leaf.
Q9. Select a process in which there is no increase in amount of carbon dioxide in air:
1. Breathing.
2. Respiration.
3. Photosynthesis.
4. Decay of vegetation.
Ans: 3. Photosynthesis.
Explanation:
In photosynthesis carbon dioxide is absorbed from air and oxygen is given out.
Q10. The sugar and starch content in leaves would beat its lowest:
1. At mid-morning.
2. In early afternoon.
3. In early evening.
4. At dawn.
Ans: 4. At dawn.
Q11. How does burrowing habit help desert animals to survive hot and dry conditions?
1. The holes and burrows are comparatively cooler and moist.
2. By remaining in burrows during day time.
3. Both the above.
4. None of these.
Ans: 3. Both the above.
Q12. It is an aquatic animal. It has no gills. They breathe in air through their nostrils or blow holes. It is:
1. Dolphins.
2. Octopus.
3. Both of these.
4. None of these.
Ans: 1. Dolphins.
2. Desert.
3. Grassland.
4. Mountain.
Ans: 1. Water.
Explanation:
The animal having a stream-lined and slippery body lives in water habitat. These are adaptations to survive in water.
Stream-lined bodies reduce resistance due to water and help in swimming.
The slippery body makes movement through water easier.
The other adaptations of these animals are gills for breathing, flat fins, tails, etc.
1. Only A.
2. Only B.
3. Both A and B.
4. None of these.
Ans: 4. None of these.
Q15. Polar bear lives at:
1. North pole only.
2. South pole only.
3. Both north pole and south pole.
4. Both at north pole, south pole and also some forests.
Ans: 1. North pole only.
Explanation:
It lives at north pole only.
Q16. What are the characteristics of a desert plant?
1. No leaves or very small leaves.
2. Spines.
3. Deep roots.
4. All of these.
Ans: 4. All of these.
Explanation:
All of these characters help the plants to survive in the scarcity of water.
Q17. Plants tend to loose a lot of water in hot weather. Which of the following helps plants to save water?
1. Shedding leaves.
2. Having more leaves.
3. Having broad leaves.
4. All of these.
Ans: 1. Shedding leaves.
Explanation:
Usually, plants shed leaves or store water in their leaves to reduce transpiration. In some plants, leaves are covered with a layer of
wax to prevent evaporation of water from their surfaces.
Q18. Which adaptation helps the camel to survive in hot and dry desert?
1. It has a layer of fat under its skin.
2. It sleeps during the day and is active at night.
3. It stores fat in its hump which can be broken down when it need energy.
4. It stores water in its long neck.
Ans: 3. It stores fat in its hump which can be broken down when it need energy.
Explanation:
Camel is called the ‘ship of the desert’. It is used for transportation. It stores reserve food in the form of fat in its hump for future use.
Q19. Which among the following has reticulate venation?
1. Plants in which seeds having single cotyledon.
2. Plants in which seeds having two cotyledons.
3. Plants having tap roots.
4. Both (b) and (c).
5. None of these.
Ans: 4. Both (b) and (c).
Q20. The rest period which many seeds undergo before they begin to grow is called:
1. Viability.
2. Germination.
3. Pollination.
4. Dormancy.
Ans: 4. Dormancy.
Explanation:
It is called dormancy.
Q21. Which one of the followings are decomposers?
1. Green plants.
2. Animals.
3. Bacteria and fungi.
4. All of these.
5. None of these.
Ans: 3. Bacteria and fungi.
Q22. Which organism depends on abiotic components for food?
1. Insects.
2. Birds.
3. Plants.
4. Fish.
Ans: 3. Plants.
Explanation:
Plants depend on abiotic components for food. They use carbon dioxide, water and sunlight for preparing food by photo-synthesis.
Q23. Breathing activity is a part of which of the following bio-chemical process?
1. Photosynthesis.
2. Digestion.
3. Respiration.
4. Excretion.
5. None of these.
Ans: 3. Respiration.
Q24. Which of the following statements is correct?
Statement 1: Living things include producers, consumers and decomposers.
Statement 2: Living things are biotic components of environment.
1. Statement 1 is correct and statement 2 is incorrect.
2. Statement 2 is correct and statement 1 is incorrect.
3. Both (a) and (b).
4. Either (a) or (b).
5. None of these.
Ans: 3. Both (a) and (b).
Q25. Which one of the following statements is correct:
Statement 1: Coastal habitats are the aquatic habitats.
Statement 2: Coastal habitats are the terrestrial habitats.
1. Statement 1.
2. Statement 2.
3. Both statements are correct.
4. Both statements are incorrect.
Ans: 1. Statement 1.
Q26. A chicken lays eggs and a cow gives birth to a calf. Which characteristic feature of living things is proved by the
given statements?
1. All living things reproduce.
2. Some living things reproduce.
3. All living things respond to stimuli.
4. Some living things respond to stimuli.
Ans: 1. All living things reproduce.
Explanation:
All living things reproduce to maintain their number. Human beings give birth to babies. Animals either lay eggs or give birth to young
ones. Plants grow from seed.
Q27. Which is not an abiotic component of environment?
1. Soil.
2. Bacteria.
3. Water.
4. Air.
Ans: 2. Bacteria.
Explanation:
Bacteria are living beings.
Q28. What adaptations do the organism shown in figure have?
1. Strong back legs.
2. Webbed feet.
3. Both (a) and (b).
4. None of these.
Ans: 3. Both (a) and (b).
Q29. Which one of the following habitats have very cold weather and covered with snow throughout the year?
1. Marine habitats.
2. Coastal habitats.
3. Grassland habitats.
4. Tundra habitats.
Ans: 4. Tundra habitats.
Q30. Which one of the following statements is correct?
1. Several kinds of plants and animals may share the same habitat.
2. All the animals and plants in a habitat are adopted to it.
3. Both the statements are correct.
4. None of these is correct.
Ans: 3. Both the statements are correct.
Explanation:
Several kinds of plants and animals may share the same habitat and adopt it.
Q31. Animals and plants have certain features which make them to survive in a particular habitat. This is called
1. Adaptation.
2. Speciation.
3. Specialisation.
4. Evolution.
Ans: 1. Adaptation.
Explanation:
Presence of features which enable plants and animals to live in a habitat
is called adaptation.
Q32. Which of the following statements is/ are correct?
1. Lions have long claws in their back legs.
2. Deer live in forests.
3. Mountain goat has weak hooves.
4. All of the above.
Ans: 2. Deer live in forests.
Explanation:
Lions have long claws in their front legs. Mountain goats has strong hooves.
Q33. In which habitat, can the animals move fast?
1. Grassland.
2. Mountain.
3. Desert.
4. Forest.
Ans: 1. Grassland.
Explanation:
In grasslands, because of the open lands, animals can move freely. Most grassland animals are able to run very fast, which allows
them to escape hunting animals.
Q34. Choose the set that represents only the biotic components of a habitat.
1. Tiger, Deer, Grass, Soil.
2. Rocks, Soil, Plants, Air.
3. Sand, Turtle, Crab, Rocks.
4. Aquatic plant, Fish, Frog, Insect.
Ans: 4. Aquatic plant, Fish, Frog, Insect.
Explanation:
Aquatic plant, fish, frog, insect represents only the biotic components of a habitat. The living things such as plants, animals and
microorganisms in a habitat are known as its biotic components.
Soil (in a), rocks, soil and air (in b) and sand and rocks (in c) are the abiotic (non-living) components.
Q35. Which option is made from something that was once alive?
1. Aluminum foil.
2. Leather purse.
3. Plastic bag.
4. Glass bottle.
Ans: 2. Leather purse.
Explanation:
A leather purse is made from skin of animals. Hence, it is a man-made things, which was once alive.
Q36. Select the characteristics that a plant adapt to survive in desert:
1. Its leaves are modified into spines.
2. Its stem is covered with thick waxy layer.
3. Its root penetrate deep into the ground.
4. All of the above.
Ans: 4. All of the above.
Q37. Which of these is the characteristic feature of only birds?
1. Feathers.
2. Wings.
3. Legs.
4. None of these.
Ans: 1. Feathers.
Explanation:
All birds have feathers on their bodies. Feathers keep birds warm and help them to fly.
Q38. Which option is not an adaptation of animals living in polar regions?
1. Wide and large paws.
2. Layer of fat under skin.
3. Thin skin with scales.
4. Strong sense of smell.
Ans: 3. Thin skin with scales.
Explanation:
Thin skin and scales are the features not suited for tropical regions.
Q39. The structure marked X in the given picture is involved in:
1. Exchange of gases during respiration.
2. Release of water.
3. Exchange of gases during photosynthesis.
4. Both (a) and (c).
Ans: 4. Both (a) and (c).
Q40. The adaptation that helps a polar bear to locate its prey is ___________.
1. Its very strong sense of smell.
2. Its long, curved and sharp claws.
3. Its white fur that is not easily visible in the snowy white back ground.
4. Layer of fat under its skin.
Ans: 1. Its very strong sense of smell.
Explanation:
Its very strong sense of smell helps it to locate its prey.
Q41. Choose the odd one out from below with respect to reproduction.
1. Eggs of hen.
2. Seeds of plants.
3. Buds of potato.
4. Roots of mango tree.
Ans: 4. Roots of mango tree.
Explanation:
Roots of mango tree is odd one as its not related to reproduction.
The other options are directly linked to reproduction.
Chickens are hatched from the eggs of hen.
Many plants reproduce through seeds.
Buds of potato tuber can grow to produce new potato plant.
Q42. Which of the following plants have tap root system?
1. Wheat.
2. Barley.
3. Grass.
4. Turnip.
5. None of these.
Ans: 4. Turnip.
Q43. A stem modification which has fibrous roots:
1. Beetroot.
2. Ginger.
3. Radish.
4. Turnip.
5. None of these.
Ans: 2. Ginger.
Q44. Which of the following is correct for respiration in plants?
1. Respiration takes place only during day time.
2. Respiration takes place only during night.
3. Respiration takes place both during day and night.
4. Respiration takes place only when plants are not making food.
Ans: 3. Respiration takes place both during day and night.
Explanation:
In plants, respiration, takes place both during day and night. During daytime, all the CO produced in respiration is used up by plants
for photosynthesis and only oxygen produced during photosynthesis is released. The plants give out CO produced in respiration only
at night time.
Q45. Direction: Match Column-I with Column-II and select the correct answer using the code given below the columns.
S.No. Column-I Column-II
A. Habitat. (p) Plants.
B. Biotic component. (q) Terrestrial habitat.
C. Abiotic component. (r) Dwelling place of an organism.
D. Desert. (s) Air.
1. A – (p), B – (q), C – (r), D – (s)
2. A – (q), B – (r), C – (p), D – (s)
3. A – (r), B – (q), C – (s), D – (p)
4. A – (s), B – (p), C – (q), D – (r)
Ans: 2. A – (q), B – (r), C – (p), D – (s)
Explanation:
Lion is a predator, deer is prey, frog has pond as its habitat, and fish have streamlined body.
Q46. _________ is the wider uppermost part of pedicel.
1. Filament.
2. Stalk.
3. Thalamus.
4. Petal.
5. None of these.
Ans: 3. Thalamus.
Q47. Which one of the following is an example of marine habitats?
1. Ocean.
2. Seas.
3. Ponds.
4. Both and (a) and (b).
5. None of these.
Ans: 4. Both and (a) and (b).
Q48. Small changes take place in the body of a single organism over short period to overcome small problems due to
changes in environment is called:
1. Habitat.
2. Adaptation.
3. Acclimatization.
4. Habit.
Ans: 3. Acclimatization.
Q49. Match the following:
S.No.Column AColumn B
(i)
Mountain
habitat
(A)
Reindeer
(ii)
Desert habitat
(B)
Mangrove
(iii)
Coastal habitat
(C) Oak
(iv)
Tundra habitat
(D)
Cactus
1. (i-D), (ii-A), (iii-B), (iv-C)
2. (i-C), (ii-A), (iii-D), (iv-B)
3. (i-C), (ii-D), (iii-B), (iv-A)
4. (i-B), (ii-D), (iii-A), (iv-C)
5. None of these.
Ans: 3. (i-C), (ii-D), (iii-B), (iv-A)
Q50. Desert animals survive in the scorching heat by:
1. Their streamlined body.
2. The thick layer of fur on their body.
3. Digging deep burrows to live.
4. All the above.
5. None of these.
Ans: 3. Digging deep burrows to live.
Q51. Dust like particles in the stamen of a flower:
1. Sepals.
2. Pollen grains.
3. Ovules.
4. Petals.
5. None of these.
Ans: 2. Pollen grains.
Q52. Which of the following is a prey?
1. Lion.
2. Tiger.
3. Deer.
4. Polar bear.
5. None of these.
Ans: 3. Deer.
Q53. Which characteristic of living things is also shown by a car?
1. Response to changes.
2. Need of energy.
3. Reproduction of its kind.
4. Taking in gases.
Ans: 2. Need of energy.
Explanation:
A car moves by the combustion of fuel and thereby it gets energy.
Q54. Direction: Read the passages given below and answer the questions that follow. Passage. The fish and many
other sea animals are adapted to live in sea. They have streamlined bodies which help them to move easily in
water. These animals have gills which help them to use oxygen dissolved in water. Fish:
1. Have slippery scales on their bodies.
2. Have flat fins and tales.
3. Both (a) and (b).
4. None of the above.
Ans: 3. Both (a) and (b).
Q55. Aestivation is an adaptation for:
1. Escaping extreme cold weather.
2. Escaping extreme hot weather.
3. Loss of water.
4. Preventing loss of water.
5. None of these.
Ans: 2. Escaping extreme hot weather.
Q56. _________ are microscopic plants living in water.
1. Microorganisms.
2. Phytoplanktons.
3. Zooplanktons.
4. Xerophytes.
5. None of these.
Ans: 2. Phytoplanktons.
Q57. Microscopic animals living in water are called:
1. Ecosystem.
2. Zooplanktons.
3. Phytoplanktons.
4. Hydrophytes.
5. None of these.
Ans: 2. Zooplanktons.
Q58. The adaptations observed in animals living in mountain habitat are/ is:
1. They have thick skin and fur.
2. They have scales on their bodies.
3. Both the above.
4. None of the above.
Ans: 1. They have thick skin and fur.
Q59. How many parts are there in a stamen?
1. 1
2. 2
3. 3
4. 4
Ans: 2. 2
Explanation:
These are anther and filament.
Q60. Environment consists of which of the following things?
1. Only biotic environment.
2. Only abiotic environment.
3. Both biotic and abiotic environment.
4. Only plants and animals.
Ans: 3. Both biotic and abiotic environment.
Explanation:
The environment consists of both living organisms (plants and animals) and non-living substances (abiotic components).
Q61. Earthworm breathes through:
1. Gills.
2. Skin.
3. Lungs.
4. Stomata.
Ans: 2. Skin.
Q62. Which among the following plants have parallel venation in their leaves?
1. Wheat.
2. Mustard.
3. Orange.
4. Tamarind.
5. None of these.
Ans: 1. Wheat.
Q63. What does the figure given below represent?
1. Interdependence between plants.
2. Interdependence between plants and animals.
3. Interdependence between animals.
4. Interdependence between abiotic factors.
Ans: 2. Interdependence between plants and animals.
Explanation:
The figure represents the interdependence between plants and animals. Animals depend on plants for food and oxygen. Plants
depend on animals for carbon dioxide.
Q64. In desert plants, the process of photosynthesis is carried out by:
1. Leaves.
2. Roots.
3. Stems.
4. Branches.
Ans: 3. Stems.
Q65. If a green leaf of a land plant is immersed in water, which of the following processes do not take place?
1. Respiration.
2. Photosynthesis.
3. Transpiration.
4. None of these.
Ans: 4. None of these.
Explanation:
None of these process can occur as the conditions required for their occurrence are not fulfilled.
Q66. A stalk which joins a flower to the stem is:
1. Pedicel.
2. Thalamus.
3. Pollen grain.
4. Stamen.
5. None of these.
Ans: 1. Pedicel.
Q67. The aquatic plants are buoyant because:
1. Their stems are soft and spongy containing air cavities.
2. They have hollow stalk and huge disc like leaves which help the plant to float on water.
3. Both the above.
4. None of these.
Ans: 3. Both the above.
Q68. What type of leaves are present in submerged plants?
1. Spinous.
2. Narrow, long and thin.
3. Thick.
4. Having layer of wax like substance.
Ans: 2. Narrow, long and thin.
Q69. A Which of the following is paired correctly?
1. Desert – Dolphin.
2. Aquatic – Giraffe.
3. Terrestrial – whale.
4. Terrestrial – deer.
Ans: 4. Terrestrial – deer.
Explanation:
The organisms that live and propagate on land are called as terrestrial organisms. Man, tiger, deer, and trees are terrestrial organisms.
Q70. The stems of plant are long, hollow and light, and its root are much reduced in size. It is adapted to which one of
the following habitats?
1. Desert.
2. Terrestrial.
3. Aquatic.
4. None of these.
Ans: 3. Aquatic.
Q71. Select the incorrect statement. In cactus plants:
1. The process of photosynthesis is generally carried out by leaves.
2. The process of photosynthesis is generally carried out by stems.
3. The stem is covered with a thick waxy layer.
4. All of the above.
Ans: 2. The process of photosynthesis is generally carried out by stems.
Explanation:
In desert plants photosynthesis is generally carried out by stems and not leaves.
(NOTE: The leaf-like structure seen in cactus (a desert plant) is, in fact, its stem.)
Q72. Why does a plant bend towards sunlight?
1. To prepare food.
2. To respire.
3. To absorb food.
4. To absorb water.
Ans: 1. To prepare food.
Explanation:
The shoot of the plant bends towards sunlight to synthesize its food.
Q73. Which is an example of an animal found in mountain region?
1. Leopard.
2. Yak.
3. Mountain goat.
4. All of these.
Ans: 4. All of these.
Explanation:
Leopard, mountain goat and yak are found in mountain region.
Q74. Horse : Terrestrial : Tortoise : __________.
1. Terrestrial.
2. Aquatic.
3. Amphibious.
4. Vertebrate.
Ans: 3. Amphibious.
Explanation:
Horse lives on land. Tortoise can live on land and water. So tortoise is amphibious.
Q75. The surroundings where an animal lives is called a/ an ___________.
1. Adaptation.
2. Ecology.
3. Habitat.
4. Stimulus.
5. None of these.
Ans: 3. Habitat.
Q76. Which of the following is/ are terrestrial habitats?
1. Forests.
2. Grasslands.
3. Desert.
4. All of these.
Ans: 4. All of these.
Q77. Which statements are true about the tree in hilly areas?
1. These trees are normally cone shaped.
2. They have sloping branches.
3. The leaves of some of these trees are needle-like.
4. All of the above.
Ans: 4. All of the above.
Explanation:
Trees found on the mountain are normally cone shaped and have sloping branches. The leaves of some of these trees are needle- like.
This helps the rainwater and snow to slide off easily.
Q78. Direction: Match Column-I with Column-II and select the correct answer using the code given below the columns.
S.No. Column-I Column-II
A. Habitat. (p) Plants.
B. Biotic component. (q) Terrestrial habitat.
C. Abiotic component. (r) Dwelling place of an organism.
D. Desert. (s) Air.
1. A – (p), B – (q), C – (r), D – (s)
2. A – (r), B – (p), C – (s), D – (q)
3. A – (r), B – (s), C – (p), D – (q)
4. A – (q), B – (r), C – (s), D – (p)
Ans: 2. A – (r), B – (p), C – (s), D – (q)
Q79. A camel is a desert animal. It shows many adaptations. Which of the following statements (P, Q, R & S) is
incorrect? P – It has a hump where fat is stored. Q – It can stay without water for long time. R – It sweats a lot. S – It
excretes large amount of urine.
1. P only.
2. Q only.
3. P & Q.
4. R & S.
Ans: 4. R & S.
Q80. Gulmohar is an example of:
1. Shrub.
2. Herb.
3. Tree.
4. Creeper.
5. None of these.
Ans: 3. Tree.
Q81. An organism X has hair on its body. It gives birth to young one that feed on their mother’s milk. Which organism is
X?
1. Rabbit.
2. Tortoise.
3. Lizard.
4. Crocodile.
Ans: 1. Rabbit.
Explanation:
The organism X is a rabbit. Rabbit is a mammal that have hair on their bodies. They give birth to young ones that feed on their
mother’s milk.
Q82. Direction: Match Column-I with Column-II and select the correct answer using the code given below the columns.
S.No. Column-I Column-II
A. Habitat. (p) Plants.
B. Biotic component. (q) Terrestrial habitat.
C. Abiotic component. (r) Dwelling place of an organism.
D. Desert. (s) Air.
1. A – (s), B – (r), C – (p), D – (q)
2. A – (r), B – (s), C – (p), D – (q)
3. A – (q), B – (p), C – (r), D – (s)
4. A – (p), B – (q), C – (s), D – (r)
Ans: 1. A – (s), B – (r), C – (p), D – (q)
Explanation:
Sage brush is a desert plant, forest is a kind of terrestrial habitat, Presence of feather sin birds is a permanent adaptation and tanning
by sun is a temporary adaptation.
Q83. On land the frog respires mainly by means of its:
1. Skin.
2. Lungs.
3. Gills.
4. Mouth.
Ans: 4. Mouth.
Q84. Which characteristics protect an animal against cold weather?
1. Thin skin.
2. Thick skin.
3. Thick layer of fat under the skin.
1. (i) and (ii) only.
2. (ii) and (iii) only.
3. (i) and (iii) only.
4. (i), (ii) and (iii).
Ans: 2. (ii) and (iii) only.
Explanation:
To protect themselves from extreme cold, some animals like penguins have thick skin and a thick layer of fat under their skin.
Q85. Direction: Read the passages given below and answer the questions that follow. Passage. The fish and many
other sea animals are adapted to live in sea. They have streamlined bodies which help them to move easily in
water. These animals have gills which help them to use oxygen dissolved in water. Select the sea animal that have
gills:
1. Whales.
2. Dolphin.
3. Fish.
4. All of these.
Ans: 3. Fish.
Explanation:
Whales and dolphins do not have gills.
Q86. A narrow stalk, through which lamina is attached to the stem:
1. Leaf blade.
2. Petal.
3. Petiole.
4. Vein.
5. None of these.
Ans: 3. Petiole.
Q87. Which among the following is not a part of carpel?
1. Stigma.
2. Filament.
3. Style.
4. Ovary.
5. None of these.
Ans: 2. Filament.
Q88. Frog belongs to which category?
1. Terrestrial.
2. Aquatic.
3. Amphibious.
4. Aerial.
Ans: 3. Amphibious.
Q89. All living things respond to __________.
1. Sound.
2. Touch.
3. Stimuli.
4. Smell.
5. None of these.
Ans: 3. Stimuli.
Q90. Which of the following adaptation is not shown by polar bear?
1. Its body is streamlined.
2. It has two thick layers of fur.
3. It has long, curved and sharp claws.
4. It has a layer of fat under the skin.
Ans: 1. Its body is streamlined.
Explanation:
The body of polar bear is not streamlined.
Q91. Desert plants have either small leaves or have only spines to:
1. Perform photosynthesis.
2. Prevent the loss of water.
3. Absorb more sunlight.
4. Release more water into environment.
5. None of these.
Ans: 2. Prevent the loss of water.
Q92. The plant in the given figure responds to:
1. Touch.
2. Sunlight.
3. Gravity.
4. Water.
Ans: 2. Sunlight.
Explanation:
Basic needs required for a plant to grow are air, water and sunlight. It prepares its food in the presence of sunlight. Its shoot system or
stem respond to light and bends towards the direction of sunlight.
Q93. In trees of mountain region, we generally find that:
1. They are cone shaped.
2. They have non-sloping branch.
3. They have needle like leaves.
4. Only (a) and (c) are correct.
Ans: 4. Only (a) and (c) are correct.
Explanation:
They have sloping branches.
Q94. Which of the following cannot be called a habitat?
1. A desert with camels.
2. A pond with fishes.
3. A jungle with wild animals.
4. Cultivated land with grazing cattle.
Ans: 4. Cultivated land with grazing cattle.
Explanation:
Cultivated land with grazing cattle cannot be called a habitat. The cattle does not live in the cultivated land, They come there, only for
feeding. A habitat is the surroundings where organisms live. It means a dwelling place, e.g. aquatic habitats such as pond.
Q95. Although organisms die, their kind continue to live on earth. Which characteristic of living organisms makes this
possible?
1. Respiration.
2. Reproduction.
3. Excretion.
4. Movement.
Ans: 2. Reproduction.
Explanation:
Reproduction is the characteristic of living organisms through which they produce more of their own kind.
Thus, even after the organisms die, their kind continue to live on earth.
Q96. Which of the following is not a long term adaptation?
1. Feathers in a bird.
2. Tanning of skin.
3. Prehensile tail.
4. Stream lined body.
Ans: 2. Tanning of skin.
Q97. Which part of a camel will shrink in size when there is no food for a long time and retain its size when food is
available?
1. Rough tongue.
2. Long eyelashes.
3. Hump.
4. Neck.
Ans: 3. Hump.
Explanation:
The hump of a camel stores food, which provides it energy during food shortage. Hence, when there is no food for a long time, the
hump will shrink in size and will retain its size when food is available.
Q98. In order to stay buoyant, some aquatic animals have a thick layer of fat. Where do you think seals store their fat?
1. Under their skin.
2. In their livers.
3. In their tails.
4. In their flippers.
Ans: 1. Under their skin.
Explanation:
Seals store a thick layer of fat under their skin.
Q99. Which of the following is not an adaptation for the polar bear to live in the arctic region?
1. It has a thick coat of fur.
2. It has a layer of insulating fat under its skin.
3. It has two thick layers of fur.
4. It has short and blunt claws.
Ans: 4. It has short and blunt claws.
Explanation:
Polar bear has wide large paws and long curved and sharp claws which help it to walk on ice.
Q100. How does a chameleon protect itself from its enemies?
1. By changing the colour of its body.
2. By releasing bad small.
3. It has a hard shell on its body.
4. By curling its body.
Ans: 1. By changing the colour of its body.
Explanation:
Animals have their own special characteristics to protect themselves from enemies and from danger. Chameleon protect itself from
enemies by changing the colour of the body.
Q101. Male part of the flower does not consist:
1. Ovule.
2. Anther.
3. Filament.
4. All the above.
5. None of these.
Ans: 1. Ovule.
Q102. Which of the following is represented by “X” in the figure given below?
1. Ocean.
2. Island.
3. Grassland.
4. Snow land.
Ans: 3. Grassland.
Explanation:
Terrestrial ecosystem includes those organisms which live on land.
It is classified into three types:
1. Forest ecosystem.
2. Grassland ecosystem.
3. Desert ecosystem.
Q103. Plants do not move from one place to another in search of food and shelter. Some plants like Mimosa (Touch-menot)
show leaf movements. A sunflower always faces the sun. From the above paragraph what can be concluded?
1. Plants can move their body parts.
2. Plants response to stimulus.
3. Plants show locomotion.
4. Both (a) and (b).
Ans: 4. Both (a) and (b).
Q104. Which option does not belong to the group formed by others?
1. Snail.
2. Fish.
3. Cup.
4. Grass.
Ans: 3. Cup.
Explanation:
We can group things that have similar characteristics together. Snail, fish and grass are living things as they can grow, breathe,
reproduce, move or die. Whereas cup is a non-living, man-made thing that cannot grow, breathe, reproduce, move or die.
Q105. Frog catches its pery with the help of ___________.
1. Teeth.
2. Legs.
3. Mouth.
4. Tongue.
Ans: 4. Tongue.
Q106. The type of habitat that is very cold and windy and in some areas of which snowfall occurs in winters is:
1. Mountain regions.
2. Grasslands.
3. Forests.
4. Deserts.
Ans: 1. Mountain regions.
Q107. Which among the following is a non-flowering plant/ tree?
1. Mango.
2. Peepal.
3. Fern.
4. Petunia.
5. None of these.
Ans: 3. Fern.
Q108. A plant that loses very little water through transpiration and has very small leaves is adapted to which of the
following habitats?
1. Mountain regions.
2. Grasslands.
3. Forests.
4. Deserts.
Ans: 4. Deserts.
Q109. The microscopic animals which live in water are called:
1. Zooplanktons.
2. Phytoplankton.
3. Hydrophytes.
4. All of these.
5. None of these.
Ans: 1. Zooplanktons.
Q110. Which term means ‘Adjustment to environment’?
1. Adaptation.
2. Mimicry.
3. Hibernation.
4. Aestivation.
Ans: 1. Adaptation.
Explanation:
Adjusting to environment is called an adaptation.
Q111. Who of the following is correct: Rahul: Living things are biotic components of environment. Rajesh: Non-living
things are abiotic components of environment.
1. Rahul.
2. Rajesh.
3. Both are correct.
4. Both are incorrect.
Ans: 3. Both are correct.
Q112. Which of the following statements is/ are correct?
1. Ponds, swamps and lakes are examples of aquatic habitats.
2. There is no variations in the habitats located in different parts of the world.
3. A biotic community consists of a single population.
4. Sunlight and heat are biotic components of a habitat.
Ans: 1. Ponds, swamps and lakes are examples of aquatic habitats.
Explanation:
There are large variations in aquatic habitats located in different parts of the world. A biotic community consists of a number of
populations. Sunlight and heat are a biotic components.
Q113. Germination means:
1. The beginning of growth of a seed after a period of dormancy.
2. The beginning of a new plant from a seed.
3. Both the above.
4. None of the above.
Ans: 3. Both the above.
Q114. Which of the following statements is/ are correct?
1. Sea animals can move easily in water because they have a streamlined body.
2. The body of octopus is streamlined.
3. The body of squids is streamlined.
4. All of the above.
Ans: 1. Sea animals can move easily in water because they have a streamlined body.
Explanation:
Squids and octopus do not have streamlined bodies. However when they move in water their body shapes streamlined.
Q115. Which of the following sets represents the abiotic components of a habitat?
1. Plants, animals, air, water.
2. Air, rocks, animals, soil.
3. Air, water, rocks, soil.
4. Animals, plants, microbes, soil.
5. None of these.
Ans: 3. Air, water, rocks, soil.
Q116. Which of the following options comprises various stages in the life of an organism in proper sequence?
1. Birth, reproduction, growth, death.
2. Growth, reproduction, birth, death.
3. Birth, reproduction, death, growth.
4. Birth, growth, reproduction, death.
Ans: 4. Birth, growth, reproduction, death.
Explanation:
Living things take birth, grow old and die. Before death they reproduce to give birth to young ones. This is true for all the organisms.
This cycle of life goes on and on. This is called life cycle.
Q117. Which adaptations enable the frogs to live both on land and in water?
1. They have gills that help them to breathe in the water.
2. Their skin, when kept moist, can take in oxygen dissolved in water.
3. They have lungs that help them to breathe when they are on land.
4. Both (b) and (c).
Ans: 3. They have lungs that help them to breathe when they are on land.
Explanation:
Moist and soft skin helps the frog to take in dissolved oxygen from the water and lungs to breathe when they are on land.
Q118. Which is a biotic component of environment?
1. Plants.
2. Animals.
3. Microorganisms.
4. All of these.
Ans: 4. All of these.
Explanation:
All of these constitute biotic components.
Q119. Which is an aquatic adaptation?
1. Streamlined body.
2. Light and hollow bones.
3. Hair on body.
4. Gills.
Ans: 1. Streamlined body.
Explanation:
Streamlined body helps them to swim.
Q120. A plant shows the following features roots are reduced in size stems are long stems have an spaces leaves are
large and flat To which category does this plant belong to?
1. Polar region.
2. Desert.
3. Rainforest.
4. Oceans.
Ans: 4. Oceans.
Q121. Bending of a stem towards sunlight is called:
1. Geotropism.
2. Phototropism.
3. Hydrotropism.
4. Nasticism.
Ans: 2. Phototropism.
Explanation:
Bending of stem towards sunlight is called phototropism.
Q122. Direction: Read the passages given below and answer the questions that follow. Passage. A lion lives in forest. It is
a strong animal. It has a light brown colour, long claws in their front leg that can be withdrawn inside the toes. It
has eyes in front of its face. The light brown colour of lion helps it:
1. To hide in green grassland when it hunts for prey.
2. To hide in dry grassland when it hunts for prey.
3. Both (a) and (b).
4. None of the above.
Ans: 2. To hide in dry grassland when it hunts for prey.
Q123. Hydrilla is an example of:
1. Floating plant.
2. Fixed plant.
3. Submerged plant.
4. Mountain plant.
5. None of these.
Ans: 3. Submerged plant.
Q124. How many parts are there in a pistil?
1. 1
2. 3
3. 4
4. 5
Ans: 2. 3
Explanation:
The three parts of a pistil are style, stigma and ovary.
Q125. Sunken stomata are present in
1. Hydrophytes.
2. Epiphytes.
3. Xerophytes.
4. Mesophytes.
Ans: 3. Xerophytes.
Explanation:
Sunken stomata are found in xerophytes plants, such plants grow under poor water condition.
Q126. From amongst the following, select the a biotic components:
(i) Air (ii) Water (iii) Heat (iv) Sunlight.
1. (i) and (ii) only.
2. (ii) and (iii) only.
3. (iii) and (iv) only.
4. All of these.
Ans: 4. All of these.
Q127. Lion is an animal which lives in ___________.
1. Desert habitat.
2. Mountain habitat.
3. Grassland habitat.
4. Rain forest habitat.
5. None of these
Ans: 3. Grassland habitat.
Q128. Respiration in plants take place:
1. Only during day time.
2. Only during night time.
3. Day and night.
4. Only in presence of sunlight.
Ans: 3. Day and night.
Explanation:
Respiration in plants take place day and night.
Q129. The earth has so many different types of plants and animals. Which word best describes the above statement?
1. Division.
2. Diversity.
3. Similarity.
4. Tropical.
Ans: 2. Diversity.
Explanation:
Diversity refers to the variety of organisms (plants, animals and microorganisms) existing on the earth.
Q130. Which adaptation helps the cactus plant to minimize loss of water?
1. Needle like leaves.
2. Broad leaves.
3. Branched stem.
4. Fibrous roots.
Ans: 1. Needle like leaves.
Explanation:
The leaves of desert plants are modified to spines, which reduce the loss of water by transpiration.
Q131. Select an animal whose body is not streamlined, however when they move in water they make the body shape
streamlined.
1. Squids.
2. Octopus.
3. Both of these.
4. None of these.
Ans: 3. Both of these.
Q132. Which of the following is not a primary function of root?
1. Anchor the plant to the soil.
2. Absorb water and minerals from the soil.
3. Gives colour to leaves.
4. Prevents soil erosion.
5. None of these.
Ans: 3. Gives colour to leaves.
Q133. How many mid-ribs are there in a leaf?
1. 1
2. 2
3. 3
4. 4
Ans: 1. 1
Explanation:
A leaf has 1 midrib.
Q134. Which one of the following is correct for the term ‘Xerocoles’?
1. Animals which live in fresh water.
2. Animals which live in mountains.
3. Animals which live in forest.
4. Animals which live in desert.
5. None of these.
Ans: 4. Animals which live in desert.
Q135. Direction: Read the passages given below and answer the questions that follow. Passage. The animals and plants
of deserts live on the desert soil and breathe air from surroundings. In deserts only little water is available. In
deserts days are quite hot and nights are quite cold. The desert animals that dig holes and burrows in the sand
and live with in _________.
1. Never come out of them.
2. Come out of their burrows at night but remain inactive.
3. Come out of their burrows during day and become active.
4. Come out of their burrows during night and become active.
Ans: 4. Come out of their burrows during night and become active.
Q136. A snow leopard:
1. Has thick far on its body but not on its feet toes.
2. Has thick far on its body including its feet and toes.
3. Both the above.
4. None of the above.
Ans: 2. Has thick far on its body including its feet and toes.
Q137. Look at the pictures below and tell which of the following is correct?
1. (i) and (ii) have deserts as their habitat.
2. Lives in forest.
3. (iii) has grassland as its habitat.
4. (i), (ii) and (iii) have mountain range as their habitat.
Ans: 4. (i), (ii) and (iii) have mountain range as their habitat.
Q138. The stems of plant are long, hollow and light, and its root are much reduced in size. It is adapted to which one of
the following habitats?
1. Desert.
2. Terrestrial.
3. Aquatic.
4. None of these.
Ans: 3. Aquatic.
Q139. Which of the following is not an example of response to stimulus?
1. Watering in mouth when we see delicious food items.
2. Closing of leaves of mimosa plant when touched.
3. Shutting our eyes when an object is suddenly thrown in our direction.
4. A chick hatching out of an egg.
Ans: 4. A chick hatching out of an egg.
Explanation:
A chick hatching out of an egg is not a response to stimuli, it is a natural phenomenon of reproduction in hens that requires particular
time period and temperature to occur. The other options are examples of response to changes in our surroundings (stimuli) which is a
characteristic of living beings.
Q140. Which among the following aquatic plants has the large and flat leaves with a waxy coating?
1. Tape grass.
2. Water lily.
3. Vallisneria.
4. Hydrilla.
5. None of these.
Ans: 2. Water lily.
Q141. Which of the following is correct for frogs?
1. They usually have ponds as their habitat.
2. They have strong front legs.
3. Both the above.
4. None of these.
Ans: 1. They usually have ponds as their habitat.
Explanation:
They have strong back legs.
Q142. The long legs of a camel:
1. Help it to move fast.
2. Help it to keep its body away from heat of sand.
3. Help it to defend itself from its enemies.
4. All of the above.
Ans: 2. Help it to keep its body away from heat of sand.
Q143. Which one of the following birds can fly?
1. Sparrow.
2. Ostrich.
3. Emu.
4. Kiwi.
Ans: 1. Sparrow.
Explanation:
Sparrow is a bird that can fly.
Q144. Respiration in aquatic animals occurs by
1. Lungs
2. Gills
3. Nostrils
4. Legs
Ans: 2. Gills.
Explanation:
Aquatic animals use gills for respiration.
Q145. Shreya touched a hot kettle and quickly pulled her hand away. Which characteristic is proved by the given
statement?
1. Reproduction.
2. Response to stimuli.
3. Growth.
4. Respiration.
Ans: 2. Response to stimuli.
Explanation:
Living things respond to changes around them. Therefore, Shreya pulled her hand away when she touched a hot kettle in response to
touch.
Q146. The plant shown in picture is a desert plant. Which of the following characteristics does it adapt to survive in
deserts?
1. Its leaves are modified into spines.
2. Its stem is covered with thick waxy layer.
3. Its root penetrate deep into the ground.
4. All of the above.
Ans: 4. All of the above.
Q147. Direction: Read the passages given below and answer the questions that follow. Passage. The animals and plants
of deserts live on the desert soil and breathe air from surroundings. In deserts only little water is available. In
deserts days are quite hot and nights are quite cold. Desert rats dig holes to live with in because:
1. This offer a moist and cool home.
2. The rats like to live in holes.
3. Rats have sharp teeth to dig holes.
4. All of the above.
Ans: 1. This offer a moist and cool home.
Q148. Leaves which have grooves allow water to drip easily and prevent rotting of leaves:
1. Drain tips.
2. Dig tips.
3. Drip tips.
4. Drag tips.
5. None of these.
Ans: 3. Drip tips.
Q149. Which of these feature polar bears adapt to live in extreme cold climate?
1. White fur, fat below skin, keen sense of smell.
2. Long tail, blunt claws, thin skin, paws.
3. White body, paws for swimming, gills for respiration.
4. Thin skin, large eyes, white fur.
Ans: 1. White fur, fat below skin, keen sense of smell.
Explanation:
The white fur helps the polar bear to conserve heat and white surfaces are poor radiators of heat. Fat stored under its skin provides
insulation against heat loss thus helping the animal to survive in the extreme cold conditions in the arctic region.
Q150. Submerged leaves can bend in flowing water due to:
1. Spongy bodies.
2. Broad and plate like leaves.
3. Narrow, thin and ribbon-like leaves.
4. All the above.
5. None of these.
Ans: 3. Narrow, thin and ribbon-like leaves.
Q151. Animal living in a habitat, which is covered by snow throughout the year:
1. Xerocole.
2. Hydrocole.
3. Tundra animal.
4. Grassland animal.
5. None of these.
Ans: 3. Tundra animal.
Q152. In which habitat, animals with thick fur are most likely to be found?
1. Grassland.
2. Mountain.
3. Desert.
4. Ocean.
Ans: 2. Mountain.
Explanation:
Mountains usually have trees that cools the environment. Hence, the animals with thick fur are most likely to be found in mountains,
fur insulate the body and keeps the body warm.
Q153. An example of a predator is a:
1. Mouse.
2. Lion.
3. Rabbit.
4. Deer.
Ans: 2. Lion.
Q154. In plant like grapevine weak stems are modified to form __________ to support weak stems.
1. Spines.
2. Tendrils.
3. Bulbs.
4. Flowers.
5. None of these.
Ans: 2. Tendrils.
Q155. Direction: Read the passages given below and answer the questions that follow. Passage. The fish and many
other sea animals are adapted to live in sea. They have streamlined bodies which help them to move easily in
water. These animals have gills which help them to use oxygen dissolved in water. Dolphins and whales:
1. Breathe in air through nostrils or blow holes.
2. Breathe in air when they swim near the surface of water.
3. Nostrils or blow holes are located in the upper parts of the body of dolphins and whales.
4. All of the above.
Ans: 4. All of the above.
Q156. A Which feature of the tortoise helps it to have few predators?
1. Big feet.
2. Little eyes.
3. Thick shell.
4. Large mouth.
Ans: 3. Thick shell.
Explanation:
The given figure represents turtle. Its thick shell protects it from the predators.
Q157. How do the desert animals survive the heat during the day?
1. They go high on the mountains.
2. They stay in the burrows during the day.
3. They migrate to nearby forest during the day.
4. All of these.
5. None of these.
Ans: 2. They stay in the burrows during the day.
Q158. Direction: Read the passages given below and answer the questions that follow. Passage. A lion lives in forest. It is
a strong animal. It has a light brown colour, long claws in their front leg that can be withdrawn inside the toes. It
has eyes in front of its face. The eyes in front of the face of a lion allow it:
1. To see its prey even at night.
2. To have correct idea about the location of its prey.
3. To keep it alert and keep on eye on its prey.
4. All of the above.
Ans: 2. To have correct idea about the location of its prey.
Q159. A main vein present in the centre of lamina, through which large number of veins spread out is called:
1. Midrib.
2. Petiole.
3. Lamina.
4. Thalamus.
5. None of these.
Ans: 1. Midrib.
Q160. The following is a list of some plants and the habitat in which they live. Which option is mismatched?
1. Mangroves – marshy areas.
2. Coconut – hot and damp places.
3. Cactus – wet areas.
4. Mango – plains.
Ans: 3. Cactus – wet areas.
Explanation:
Cactus plants grow in deserts.
Q161. Which one of the following is not associated with reproduction?
1. A new leaf coming out of a tree branch.
2. A dog giving birth to puppy.
3. A seed growing into a plant.
4. Chick hatching from an egg.
Ans: 1. A new leaf coming out of a tree branch.
Explanation:
A new leaf coming out of a tree branch is not associated with reproduction. It is associated with growth.
Reproduction is the process by which living things produce more of their own kind, e.g. dog giving birth to puppy, seed growing into
plant and chick hatching from egg.
Q162. Which among the following is not an underground stem?
1. Ginger.
2. Potato.
3. Sweet potato.
4. Garlic.
5. None of these.
Ans: 3. Sweet potato.
Q163. Hot and dry place with scarcity of water is a characteristic of which habitat?
1. Grassland habitat.
2. Marine habitat.
3. Coastal habitat.
4. Xeric habitat.
5. None of these.
Ans: 4. Xeric habitat.
Q164. Which of the following are/is biotic components of a habitat?
1. Lion.
2. Tiger.
3. Plants.
4. All of these.
Ans: 4. All of these.
Q165. An animal that live in grasslands, has strong teeth for chewing hard plant stems and has long ears to hear
movement of predators is:
1. Lion.
2. Tiger.
3. Deer.
4. All of these.
Ans: 3. Deer.
Explanation:
Lion and tiger are predators.
Q166. Which animal can be placed in group Z?
1. Bird.
2. Frog.
3. Shark.
4. Dog.
Ans: 2. Frog.
Explanation:
Z represents an animal that can live both on land and in water. Hence frog, which is an amphibian can be placed in Z. The bird and dog
live on land while shark lives in water.
Q167. Which of the following is an abiotic component of habitat?
1. Tulsi.
2. Snail.
3. Bacteria.
4. Water.
Ans: 4. Water.
Explanation:
All non-living things such as soil, water, sunlight, temperature etc. are abiotic component of an habitat. Tulsi, snail and bacteria are
living components of an habitat.
Q168. Following are some features of plants:
1. They lose a lot of water through transpiration.
2. Their leaves are always broad and flat.
3. They lose very little water through transpiration.
4. Their roots grow very deep into the soil.
Which of the combination of above features are typical of desert plants?
1. (i) and (ii)
2. (ii) and (iv)
3. (ii) and (iii)
4. (iii) and (iv)
Ans: 4. (iii) and (iv)
Explanation:
Features of desert plants that help them to survive there are:
Lose very little water through transpiration.
Leaves are either absert, very small or reduced to spines.
Stem is covered with thick waxy layer to retain water.
Root grow very deep into the soil for absorbing water.
Q169. Exchange of gases in plants take place through tiny pores on leaves called __________.
1. Holes.
2. Stomata.
3. Veins.
4. None of these.
Ans: 2. Stomata.
Q170. Which of the following animals have no gills?
1. Both (i) and (ii).
2. Both (ii) and (iii).
3. Both (i) and (iii).
4. All of these.
Ans: 2. Both (ii) and (iii).
Explanation:
Dolphin and whale have no gills.
Q171. Which option is related to the function of scaly skin of snakes?
1. To protect them from drying.
2. To scare human beings.
3. To make them beautiful.
4. To help them to crawl.
Ans: 4. To help them to crawl.
Explanation:
The scales enable it by wriggling its body to gain a grip on moist surfaces.
Q172. Direction: Read the passages given below and answer the questions that follow. Passage. A lion lives in forest. It is
a strong animal. It has a light brown colour, long claws in their front leg that can be withdrawn inside the toes. It
has eyes in front of its face. The habitat of a lion is:
1. Terrestrial habitat.
2. Forest.
3. Grassland.
4. All of the above.
Ans: 4. All of the above.
Q173. Which of the following are characteristics of living beings ?
1. Respiration.
2. Reproduction.
3. Adaptation.
4. Excretion.
Choose the correct answer from the options below:
1. (i), (ii) and (iv) only.
2. (i) and (ii) only.
3. (ii) and (iv) only.
4. (i), (ii), (iii) and (iv).
Ans: 4. (i), (ii), (iii) and (iv)
Explanation:
The living beings have some common characteristic that makes them different from the non-living. These are respiration,
reproduction, adaptations, excretion, growth, nutrition and movement.
Q174. Which of the following statements is/ are correct?
1. Xerophytes refers to desert plants and animals.
2. There are no roots in desert plants.
3. Desert plants do not show the process of transpiration.
4. In mountains regions we see different kinds of adaptations at different heights.
Ans: 4. In mountains regions we see different kinds of adaptations at different heights.
Explanation:
Xerophytes are desert plants. Desert plants have long roots. Desert plants lose very little water through transpiration.
Q175. In which of the following animals the breathing process is similar to that of human beings?
1. Cows.
2. Earthworm.
3. Fish.
4. None of these.
Ans: 1. Cows.
Explanation:
The process of breathing in cows is similar to that in human beings.
Q176. What is the other name of leaf blade?
1. Petiole.
2. Lamina.
3. Vein.
4. Stalk.
5. None of these.
Ans: 2. Lamina.
Q177. Which of the following is not a characteristic of a desert plant?
1. Leaves are either absent or present in the form of spines.
2. Photosynthesis is usually carried out by the green stem.
3. Roots are small and do not penetrate deep under the soil.
4. All the above.
5. None of these.
Ans: 3. Roots are small and do not penetrate deep under the soil.
Q178. Which of these plants is usually weak stemmed with numerous air spaces and very thin long and waxy coated
leaves?
1. Mesophytes.
2. Xerophytes.
3. Bryophytes.
4. Hydrophytes.
Ans: 4. Hydrophytes.
Explanation:
Hydrophytes inhabit water bodies like ponds, lakes and rivers.
Q179. Match the following:
S.No. Column A Column B
(i) Herb (A)Henna
(ii) Shrub (B) Pea
(iii)
Creeper
(C)
Bottlegourd
(iv)
Climber
(D)
Cabbage
1. (i – C), (ii – A), (iii – D), (iv – B)
2. (i – D), (ii – B), (iii – A), (iv – C)
3. (i – C), (ii – B), (iii – D), (iv – A)
4. (i – D), (ii – A), (iii – C), (iv – B)
5. None of these.
Ans: 4. D) (i – D), (ii – A), (iii – C), (iv – B)
Q180. The plant shows.
1. Phototropism.
2. Geotropism.
3. Photosynthesis.
4. Respiration.
Ans: 1. Phototropism.
Q181. Streamlined body is one of the adaptations found in:
1. Water animals.
2. Desert animals.
3. Mountain animals.
4. Grassland animals.
5. None of these.
Ans: 1. Water animals.
Q182. Plants with fibrous roots have:
1. Reticulate venation in leaves.
2. Parallel venation in leaves.
3. Both (a) and (b).
4. Either (a) or (b).
5. None of these.
Ans: 2. Parallel venation in leaves.
Q183. Which is the major component of the living environment?
1. Water.
2. Soil.
3. Trees.
4. Ponds.
Ans: 3. Trees.
Explanation:
Trees are the major components of the living environment.
Also Read Notes: –Class 6th Science Chapter 9 The Living Organisms And Their Surroundings