Question

Q4. Answer the following-
i. Write the steps involved in nutrition in human.
ii. What are villi and what is their function?
iii. Explain the process of digestion in amoeba with the help of diagram.

Answer 1

Answer:

there are five steps

ingestion

digestion

absorption

assimilation

egestion

2 villi are the fingers like projections in small intestine which increases surface area for absorption

3

Answer 2

Explanation:

pcyscho?

In biology, immunity is the capability of multicellular organisms to resist harmful microorganisms. Immunity involves both specific and nonspecific components. The nonspecific components act as barriers or eliminators of a wide range of pathogens irrespective of their antigenic make-up.