Increases in Atmospheric Oxygen Benefitted Early Eukaryotes

question 135

Multiple Choice

Increases in atmospheric oxygen benefitted early eukaryotes.Which statement concerning this phenomenon is false?

• A) It killed off numerous prokaryotes, thus reducing competition for resources.
• B) It became an essential component of energy metabolism.
• C) The flexible cell membrane allowed acquisition of more oxygen through diffusion.
• D) Increased energy facilitated development of more cellular complexity.
• E) Oxygen could be eliminated by contractile vacuoles.

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