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Answer» (a) Hibernation and Aestivation | Hibernation | Aestivation | | Hibernation is a state of reduced activity in some organisms to escape cold winter conditions | Aestivation is a state of reduced activity in some organisms to escape desiccation due | | Bears and squirrels inhabiting cold regions are examples of animals that hibernate during winters | Fishes and snails are examples of organisms aestivating during summers. |
(b) Ectotherms and Endotherms | Ectotherms | Endotherms | | Ectotherms are cold blooded animals. Their temperature varies with their surroundings. | Endotherms are warm blooded animals. They maintain a constant body temperature. | Fishes, amphibians, and reptiles are ectothermal animals. |
| Birds and mammals are endothermal animals |
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