The process of cellular respiration 1. occurs before plants are able to carry out photosynthesis.
2. is performed only by animals.
3. occurs in all living organisms.
4. is performed only by organisms that can't photosynthesize.

3. occurs in all living organisms.

Explanation:

this is the process where organisms are able to break down organic molecules contained in food consumed to acquire energy.

a) carbon, hydrogen

b) carbon, hydrogen, oxygen, nitrogen

c) carbon, hydrogen, oxygen, nitrogen, phosphorus

d) sugar

e) amino acid

f) nucleotide