2
QuizMultiple Choice

Organisms and the Environment — Test

Question 2 • Biology

Both photosynthesis and cellular respiration are part of the carbon cycle. Which statement best compares these two processes?

Answer
A
Both require fixation in order to convert molecules.
B
Both release carbon dioxide as waste.
C
Both add bacteria to the soil.
D
Both provide organisms with usable energy.

Explanation

Photosynthesis uses sunlight to store energy in sugars, which organisms can use directly or obtain by eating plants. Cellular respiration breaks down sugars to release usable energy for cells. So both processes provide organisms with usable energy; photosynthesis does not release carbon dioxide as waste, as choice A claims.

AI-written and checked against the verified answer.

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