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

2 answers:

5 0

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.

nadezda [96]3 years ago

4 0

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

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