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Which of the following present challenges that make gas exchange more difficult for fish than for terrestrial animals? Select all that apply.
A. Water is denser and more viscous than air.
B. Water contains much less O2 than air per unit volume.
C. Gills have less surface area than lungs.
D. Unidirectional flow of water is less efficient than tidal ventilation.
E. Diffusion occurs more slowly in water than in air.
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Which of the following present challenges that make gas exchange more difficult for fish than for te...
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