| Hibernation | Aestivation |
|---|---|
| $1.$ Hibernation is a state of reduced metabolic activity in some organisms to escape cold winter conditions. | $1.$ Aestivation is a state of reduced metabolic activity in some organisms to escape desiccation due to heat in summers. |
| $2.$ Bears and squirrels inhabiting cold regions are examples of animals that hibernate during winters. | $2.$ Fishes and snails are examples of organisms that aestivate during summers. |
| Ectotherms | Endotherms |
|---|---|
| $1.$ Ectotherms are cold-blooded animals. Their body temperature varies with their surroundings. | $1.$ Endotherms are warm-blooded animals. They maintain a constant body temperature. |
| $2.$ Fishes,amphibians,and reptiles are ectothermal animals. | $2.$ Birds and mammals are endothermal animals. |
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