4. Define the following terms.
(a) Peristalsis
(b) Mastication
5. Write one similarity and difference between
amoeba and human being.
6. A bread piece tastes sweet while it is being
swallowed. Why?
7. Why do you think herbivores have a four-
chambered stomach?
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a)peristalsis:
It is process in which contraction and relaxation takes place
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