Which of the following statements about oxygen is false?

a. Only the oxidation of organic molecules by O2 provides sufficient energy to support large, active organisms.
b. Oxygen is the only potential electron acceptor available on Earth's surface.
c. Oxygen is necessary for complex multicellular life.
d. Oxygen concentrations in the atmosphere favor diffusion into the interior cells of organisms.
e. Oxygen became abundant in the atmosphere 580-560 million years ago.


Ans: b. Oxygen is the only potential electron acceptor available on Earth's surface.

Biology & Microbiology

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