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Question
Write a short note on adaptations of plants to water scarcity.
Short/Brief Note
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Solution
Plants found in deserts are well adapted to cope with water scarcity and the scorching heat of the desert.
- Plants have an extensive root system to tap underground water.
- They bear thick cuticles and sunken stomata on the surface of their leaves to reduce transpiration.
- In Opuntia, the leaves are modified into spines, and green stems carry out the process of photosynthesis.
- Desert plants have special pathways to synthesize food, called the CAM (C4 pathway). It enables their stomata to remain closed during the day to reduce water loss by transpiration.
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Chapter 15: Organisms and Populations - NCERT EXERCISES [Page 615]
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Word search puzzle - Nocturnal Animals
| S | N | A | K | E | O | B |
| X | O | W | L | U | N | A |
| L | V | F | E | C | A | T |
| F | I | R | E | L | L | Y |
| Animal observation | ||
| Name of the animal | What is the adult doing? | What is the young one doing? |
Match the columns.
| I | II | ||
| i. | Behavioural adaptation | a. | Desert plants possess CAM pathway |
| ii. | Morphological adaptation | b. | Mammals from colder climates possess shorter snout, tail, ears and limbs |
| iii. | Physiological adaptation | c. | Desert lizards regulate body temperature |
Read the given statement and choose the correct option.
Statement I: Polar animals have a thick layer of fat below skin.
Statement II: The blubber below polar animals' skin allows heat from outside to enter into the body.
The presence of specific features, which enable a plant or an animal to live in a particular habitat, is called ______.
Dog shivers to generate more heat.
Transpiration facilitates ______.
