Question

Which life function involves changing the energy stored in food into a form that can be directly used by cells?

A) excretion
B) respiration
C) synthesis
D) transport

Answer 1

Excretion would be removing waste products from the cell, while respiration is about breathing and getting oxygen into the body (in animals, at least). Transport is about transporting blood and nutrients through the body. So what do you think the answer should be?

Answer 2

The answer to this would be B. Respiration.