Question

Mention two major anatomical adaptations of class Avis that helps in aerial mode of life.​

Answer 1

Answer:

1. Birds are endothermal or warm-blooded animals.

2. Body is streamlined and compactly arranged to suit their adaptation for flights.

3. It is normally spindle-shaped and light due to the presence of air sacs.

4. Forelimbs are modified as wings.

5. Hind limbs are large and bear the weight of the whole animal.

6. Body is covered by feathers. They form a part of the exoskeleton.

7. The feathers are of four types- 1.Contour feathers

                                                       2.Filoplumes

                                                       3.Quill feathers and

                                                      4.Down feathers.

Explanation: