During cellular respiration, every living thing in this food web uses ______ gas and releases ______ back into the environment.

Acarbon dioxide:oxygen
Boxygen:carbon dioxide
Ccarbon dioxide:hydrogen
Dcarbon dioxide:water vapor

Verified Answer :


b is the right answer because we breathe oxygen and when we breathe out we let out carbon dioxide

oxygen : carbon dioxide

this is because oxygen atoms bind to the hydrocarbons from food (glucose etc.) during formation ATP (Kreb's cycle). Carbon dioxide is a basic waste product which is removed because it increases the acidity of the blood if build-up occurs.