Biology Class 12 NCERT Solutions: Chapter 13 Organisms and Populations Part 4

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Q.10 Distinguish between the following:

(a) Hibernation and Aestivation

(b) Ectotherms and Endotherms

Answer:

  1. Hibernation and Aestivation:

Table of Hibernation V/S Aestivation
Table of Hibernation V/S Aestivation

Hibernation

Aestivation

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.

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.

Image of Hibernation V/S Aestivation:

Image of Hibernation V/S Aestivation

  1. Ectotherms and Endotherms:

Table of Ectotherms V/S Endotherms
Table of Ectotherms V/S Endotherms

Ectotherms

Endotherms

1.

Ectotherms are cold blooded animals. Their 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.

Image of Ectotherms V/S Endotherms

Image of Ectotherms V/S Endotherms

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