The answer is d. A large asteroid or comet impacted the Eartg
Answer:
Genetics take a long time to mutate.
Explanation:
Answer:
All
Explanation:
The electron transport chain is a series of four protein complexes that couple redox reactions, creating an electrochemical gradient that leads to the creation of ATP in a complete system named oxidative phosphorylation. It occurs in mitochondria in both cellular respiration and photosynthesis.
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