hibernation
aestivation
rejuvenation
xeromorphism
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Discussions (8)
Xeromophism applies only to plants having characteristics that serve as protection against excessive loss of water and not animal.
So the Correct answer is AESTIVATION.
Hibernation occurs only when food is insufficient in winter and sources of foods are in short supply
The answer shud be aestivate not xeromophism........the question says animal not plant
all the past question i have came across always pick xeromorphism as the answer bt its wrong...xeromorphism is the ability of some plant to survive in arid zones...whereas the question asked is about adaptation of animals in dry condition which i think its aestivation...
The correct answer is:
B. Aestivation
Explanation:
Aestivation is a physiological adaptation in which animals become inactive or dormant during very hot and dry conditions to conserve water and reduce metabolic activity.
Examples include snails and some amphibians that burrow into the soil during drought.
Why not the others?
Hibernation → Dormancy during cold conditions (winter).
Rejuvenation → Renewal or restoration of youth (not an adaptation to dryness).
Xeromorphism → Structural adaptation in plants to dry conditions, not animals.
So, the correct answer is B. Aestivation.
What is Aestivation?
Aestivation is a physiological adaptation in which an animal:
Becomes inactive or dormant
Reduces its metabolic rate
Minimizes water loss
Survives extreme heat and dryness
It usually happens during very dry or hot seasons.
Why Animals Aestivate
In very dry conditions:
Water becomes scarce
High temperature increases water loss
Food may be unavailable
To survive, animals:
Burrow into soil or mud
Form protective coverings (e.g., mucus in snails)
Slow down body activities
This helps them conserve energy and water until conditions improve.
Examples of Animals That Aestivate
Snails
Earthworms
Some frogs (e.g., African lungfish)
Toads
Why Other Options Are Wrong
A. Hibernation
→ Occurs during cold weather, not dry weather.
C. Rejuvenation
→ Means becoming young again — not related to dry conditions.
D. Xeromorphism
→ A structural adaptation in plants (like thick cuticles, small leaves) to reduce water loss.
Key Difference to Remember
Hibernation → Cold condition
Aestivation → Hot and dry condition
That’s why the correct answer remains B. Aestivation.
