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प्रश्न
Define the term Adaptation. State its two advantages.
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उत्तर
Definition: Adaptation is an attribute of the organism (morphological, physiological, and behavioural) that enables the organism to survive and reproduce in its habitat.
i. Adaptations of plants for aquatic and desert habitats:
a. Adaptations of plants for aquatic habitats:
- Leaves and stem of some aquatic plants show presence of aerenchyma tissue which helps in exchange of gases between plant organs above the water surface and submerged plant organs.
- Many aquatic plants have flat leaves to receive maximum sunlight for photosynthesis. Leaves of submerged plants are often dissected to minimize water resistance.
b. Adaptations of plants for desert habitats:
- Many desert plants have a thick cuticle on their leaf surfaces and have their stomata in deep pits to minimize loss of water through transpiration.
- They show a special photosynthetic pathway (CAM - Crassulacean Acid Metabolism) that enables their stomata to remain closed during daytime.
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संबंधित प्रश्न
Define phenotypic adaptation.
Give an example of an endothermic animal.
Give an example of an ectothermic animal.
Give an example of an organism of benthic zone.
How do ants feel the vibration?
The behaviour of some desert animals to burrow into the sand to hide and escape from the heat is a type of ______.
Match the Column I with Column II and select the correct option.
| Column I | Column II | ||
| i. | CAM pathway | a. | Bv product-water |
| ii. | Opuntia | b. | Possess shorter ears and limbs |
| iii. | Mammals from colder climate | c. | Leaves reduced to spines |
| d. | Stomata remains closed during daytime |
Dog shivers to generate more heat.
Although organisms die, their kind continue to live on earth. Which characteristic of living organisms makes this possible?
Unscramble the given word below to get the correct word using the clues given against them.
| LUMISIT | All living things respond to these |
