Question

What is respiration? How does it occurs?

Answer 1

Answer:

it is a method of breathing in biology

Answer 2

Answer:

Explanation:

(i) The process of release of energy by oxidation of

food is called as respiration.

(ii) In living organisms, respiration occurs at two

levels - body and cellular level.

(iii) In case of body level, oxygen and carbon

dioxide are exchanged between the body and

surrounding.

(iv) In case of cellular level, food is oxidized either with

or without the help of oxygen to release energy.