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Question
How can the plants like cactus and acacia live in deserts with scarce water?
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Solution
Cactus and acacia plants withstand hot and dry environment of the desert with the help of various modifications. They have thick cuticle on their leaf surface and their stomata are arranged in deep pits to minimise water loss by transpiration. They have special photosynthetic pathway, CAM in which stomata remains closed during day time. Their leaves are reduced to spines to minimise water loss and photosynthetic functions are performed by flattened stems.
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Put a tick mark (✓ ) against the correct alternative in the following statements:
Slow breathing is the characterstics of:
Define the following:
Adaptation
Name any three types of terrestrial habitat.
Name two types of terrestrial habitats with low temperature.
Find my match!
| 'A' Group | 'B' Group |
| (1) Lotus | (a) Flower and leaves attract insects |
| (2) Aloe | (b) Haustorial roots for the absorption of food |
| (3) Cuscuta | (c) Adapted to live in deserts |
| (4) Venus flytrap | (d) Adapted to live in water |
Read the features of plant given below:
Thick waxy stem
Read the features of plant given below:
Short roots
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Sloping branches
Read the features of plant given below:
Small or spine-like leaves
Read the features of plant given below:
Hollow stem
