Question

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

A)
carbon dioxide:oxygen
B)
oxygen:carbon dioxide
C)
carbon dioxide:hydrogen
D)
carbon dioxide:water vapor

Answer 1

Blank 1 is oxygen

Blank 2 is carbon dioxide

Answer 2

B) oxygen:carbon dioxide, because of the process of Cellular respiration, the process by which organisms combine oxygen with foodstuff molecules, diverting the chemical energy in these substances into life-sustaining processes and discarding, as waste products, carbon dioxide and water.