Question

The bird has a spindle shaped body. how does it helps to the bird.
1. It minimizes the resistance of air while flying.
2. It minimizes the weight of body of bird.
3. It is useful fir having prey.
4. It is useful for self protection.

Answer 1

Q. The bird has a spindle shaped body. How does it helps to the bird?

Answer : It minimizes the resistance of air while flying.

→ Extra information :

Flight adaptations of the birds are the following :

1. Forelimbs are modified into wings.
2. Body is covered with exoskeleton of water-proof and light-weight feathers.
3. Long bones of endoskeleton and pneumatic having air cavities.
4. All birds are toothless; their jaws are modified into honey beaks.
5. Body is streamlined to reduce air resistance during its flight.
6. Birds have air sacs helping in double respiration.
7. Fight muscles are well developed.
8. Tail feathers from a steering apparatus.
9. Birds have a acute vision.

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Answer 2

Birds have a streamed line body that reduces the air friction.

Option (A) is correct.

Explanation:

• Birds fly in the sky due to the presence of wings.
• Their strong muscles and wings help them to fly high in the sky.
• In the chest of the birds strong muscles are present to which wings are attached.
• They flap their wings as the muscles get stronger with their growth.
• Birds have a streamed line body that reduces the air friction.