Class 12 Biology Organisms and Population: NCERT Solutions for Question 10
Distinguish between the following:
(a) Hibernation and Aestivation
(b) Ectotherms and Endotherms
(a) Hibernation and Aestivation
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Hibernation |
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Aestivation |
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1. |
Hibernation is a state of reduced activity in some organisms to escape cold winter conditions. |
1. |
Aestivation is a state of reduced activity in some organisms to escape desiccation due to heat in summers. |
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2. |
Bears and squirrels inhabiting cold regions are examples of animals that hibernate during winters. |
2. |
Fishes and snails are examples of organisms aestivating during summers. |
(b) Ectotherms and Endotherms
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Ectotherms |
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Endotherms |
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1. |
Ectotherms are cold blooded animals. Their temperature varies with their surroundings. |
1. |
Endotherms are warm blooded animals. They maintain a constant body temperature. |
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2. |
Fishes, amphibians, and reptiles are ectothermal animals. |
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Birds and mammals are endothermal animals. |
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