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