Larger Single-Celled Organisms Require a Higher Oxygen Concentration Than Smaller

question 172

Multiple Choice

Larger single-celled organisms require a higher oxygen concentration than smaller ones do because the large cells

• A) have a faster metabolic rate per unit mass.
• B) have a slower metabolic rate per unit mass.
• C) have a lower surface area-to-volume ratio.
• D) have a greater surface area-to-volume ratio.
• E) divide more quickly than small cells do.

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