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3.3.2 Test (CST): Ecosystems
Question 5 of 25
Which statement describes how chemical elements move through an
ecosystem?
A. Heterotrophs release carbon dioxide as a waste product during
photosynthesis.
B. Photoautotrophs use chemicals from the Sun to form organic
matter.
C. Chemoautotrophs use photosynthesis and energy from the Sun to
form organic matter.
OD. Autotrophs release oxygen as a waste product during
photosynthesis.