Question

Bones are without bone marrow in which animal​

Answer 1

Birds have pneumatic bones which is hollow and devoid of bone marrow. Pneumatic bone make the body of animal light and buoyant which is essential for flight.

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Answer 2

Explanation:

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Birds have pneumatic bones which is hollow and devoid of bone marrow. Pneumatic bone make the body of animal light and buoyant which is essential for flight.