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.

Question

Quizplus · Accepted Answer

Oxygen cannot be eliminated by contractile vacuoles, as these organelles are involved in the regulation of water and ion concentrations within the cell. Oxygen is essential for cellular respiration and cannot be actively removed from the cell.

Increases in Atmospheric Oxygen Benefitted Early Eukaryotes