Question

Which of these is a product of respiration.
A. CO2
B. O2
C. C2H4
D. H2

Answer 1

Answer: A. CO2

Explanation: The body uses oxygen or O2 to help resperate the cells, and CO2 is created as a biproduct and released back into then environment through exhalation.

Answer 2

A. CO2

Step-by-step explanation:

Cellular respiration converts oxygen and glucose into water and carbon dioxide. Water and carbon dioxide are by-products.