Which of the following statements about oxygen is false?

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


A

Biology & Microbiology

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