Question

B. Fill in the blanks.
1. Birds have
bones which keep them
2. There are a total of
bones present in the skull.
3. Snakes move in a
motion and press against the ground with the
help of
on their bodies in order to push forward.
4. Fish, amphibians, reptiles, birds and mammals are categorised as
they have a vertebral column.
5. There are
bones in an adult human being.​

Answer 1

Answer:

A bird's bones are denser. This density makes these thin, hollow bones stiffer and stronger to keep them from breaking. Crisscrossing struts or trusses also provide structural strength.

Answer 2

Answer:

1)

2) 22 bones

3)

4)

5) 206 bones

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