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प्रश्न
Describe the aerial adaptations in birds
उत्तर
The bird’s body is perfectly adapted for aerial life. Various aerial adaptations found in birds are:
- Body shape: The body of birds is streamlined. Necks stretched forward with the head pointed in front and a narrowed tail at the end provide them a sleek shape. The body surface is smooth to minimize resistance against air.
- Wings: The forelimbs are modified into wings. The fingers are very much reduced. The whole length of the forelimb carries long flight feathers.
- Steering and brakes: The feathers on the tail help to slow down the speed and also help in steering (changing direction).
- Wing muscles: These are the much strong, active and enlarged breast muscles.
- Cutting down the body weight: Except for the most necessary bulky heavy wing muscles, the rest of the bird’s body tends to be light to facilitate flight.
- Bones have air cavities.
- Much less water is required in the body.
- The birds excrete solid urine (formed of uric acid instead of urea which otherwise requires much water to be excreted out).
- Right ovaiy and oviduct are greatly reduced.
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संबंधित प्रश्न
Put a tick mark (✓ ) against the correct alternative in the following statements:
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Put a tick mark (✓ ) against the correct alternative in the following statements:
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Give an account of adaptations of birds.
