question_answer

Give reasons for the following

(i) Some animals like frog, show hibernation.

(ii) Clownfish lives among the tentacles of sea anemone.

(iii) Desert plants bear thick cuticle on their leaf surfaces.

Answer:

(i) Some animals like frog hibernate. Sometimes the unfavourable (stressful) conditions are for a short duration and if the animals are not able to migrate, they hibernate to avoid the stress by escaping in time.

(ii) The interaction between a clownfish and a sea anemone is called commensalism. As the sea anemone has stinging tentacles, the clownfish gets protection from its predators as the tentacles keeps them away. Thus, the clownfish is benefitted while on the other hand sea anemone is neither benefitted nor harmed.

(iii) Desert plants have a thick cuticle on their leaf surfaces and have their stomata arranged in deep pits to minimise the water loss through transpiration. These plants have special photosynthetic pathway (CAM) that enables their stomata to remain closed during day time to minimise the rate of transpiration.