Question

A diagram of the carbon-oxygen cycle is shown below.



Which of these best describes the role of plants in the carbon-oxygen cycle?
A.
to absorb carbon dioxide from the atmosphere and release it back into the atmosphere
B.
to absorb oxygen from the atmosphere and release carbon dioxide into the atmosphere
C.
to absorb oxygen from the soil and use it to make carbon dioxide for sugar production
D.
to absorb carbon dioxide from the atmosphere and use it to make sugar

Answer 1

D

Plants take in carbon dioxide from the atmosphere and, using light energy in photosynthesis, fix that CO2 into sugars (glucose), releasing oxygen as a byproduct.