Answer:
Anabolism
Explanation:
Anabolism is a type of biochemical reaction that makes up metabolism, the other one is catabolism. Anabolism builds complex molecules from simpler ones, while catabolism breaks them down.
Cyanobacteria, photosynthetic organisms that produce oxygen as a byproduct first appeared.
The answer is D, because the Nereus is designed to be remotely operated
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