Adaptations in Plants Test 1

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Adaptations in Plants Test 1

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Weekly Quiz Competition

Question 1
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Shreya plucked a lotus plant from a pond near her house. She observed that it has a long hollow stem. Can you explain the function of the stem?

A
To help leaves float on water

B
To absorb soil

C
To fix the plant to the bottom of the pond

D
To make the flower beautiful

Solution

The stems in lotus plants are hollow and very light.
This helps the leaves to float on water.
Question 2
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Plants in hilly areas have to bear high speed winds and cold. Which of the following adaptations best helps them face the above conditions?

A
Having lots of branches and leaves

B
Tall and straight trunk with needle like leaves

C
Leaves which are modified into spines

D
Breathing roots which come above the ground

Solution

The trees that grow in hilly areas have needle like leaves, which are very tough and can survive in the cold, snow and wind.
Question 3
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Plants give out water through the pores present on the lower side of their leaves. Plants living in deserts need to reduce the loss of water because water is very scarce in deserts. Which of the following is an adaptation developed by the desert plants to manage the above situation?

A
They have lots of branches and leaves.

B
They do not shed leaves in the summer.

C
They develop roots which come above the ground.

D
Their leaves are modified into spines.

Solution

The leaves of desert plants are reduced ' to spines to prevent loss of water.
Question 4
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Which of the following have leaves without pores?

A
Underwater plants

B
Fixed plants

C
Floating plants

D
Evergreen plants

Solution

Underwater or submerged plants have no stomata.
Question 5
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In cactus plants, photosynthesis occurs in

A
leaves

B
spines

C
roots

D
stems

Solution

In cactus plants, photosynthesis occurs in its thick and fleshy stems.
Question 6
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Ramu brought a plant with thick branches and leaves from the plains and planted it in a marshy area. What must the new plant do to survive in its new environment?

A
It must change its colour in its new environment.

B
It must change its leaves into spines to reduce the loss of water.

C
It must start trapping insects and eat them.

D
It must develop breathing roots to get more air.
Solution
- In marshy areas, soil does not contain air.
- To adjust to marshy conditions, the plant should develop breathing roots.
Question 7
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Mangroves develop aerial roots. This is an adaptation to the

A
type of soil

B
temperature

C
amount of water available

D
amount of rain
Solution
- Mangroves grow in marshy areas. Marshy soil have clay soil with plenty of water and has no air.
- The water cannot drain away and remains in the soil.
- Hence the plants in the soil develop breathing roots that help the roots to breathe.
Check out the image of Mangroves below:
Question 8
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Which of the following statements is FALSE regarding hilly trees like the Pine?

A
They do not have flowers.

B
They are dome shaped.

C
They are conifers.

D
Their leaves are needle-shaped.
Solution
- Trees in hilly areas are usually tall and cone shape and not dome shaped.
- Trees in hilly areas do not have flowers.
- They are conifers and their leaves are needle-shaped.
Question 9
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Which of the following plants does not need soil to grow?

A
Cactus

B
Fern

C
Water hyacinth

D
Pitcher plant
Solution
- Water hyacinth is an aquatic plant that floats on water.
- Water hyacinth does not need soil to grow.
Question 10
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The plants that are most useful to man are

A
hilly plants.

B
underwater plants.

C
desert plants.

D
plants of the grass family.

Solution

Plants of the grass family provide us with cereals, hence they are most useful to us.