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In Order to Obtain O2, Water-Breathers Face a Substantially Greater

Question 59

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In order to obtain O2, water-breathers face a substantially greater challenge compared to air-breathers. Which of the following is not a reason for this difference?


A) Water contains less O2 per liter than air does.
B) Water is denser than air.
C) Water can become anoxic more readily than air can.
D) Oxygen diffuses more slowly across respiratory surfaces in water than in air.

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