A-LevelBiologyGas exchange9700/12 · Oct/Nov 2024 · Q331 Mark
Which row shows the features of the gas exchange surface that increase diffusion of carbon dioxide and oxygen?
This question uses a diagram from the original paper, which isn't shown here. Open the full paper from the past papers archive to see it.
Aconcentration gradient: steep, diffusion distance: long
Bconcentration gradient: steep, diffusion distance: short
Cconcentration gradient: shallow, diffusion distance: long
Dconcentration gradient: shallow, diffusion distance: short
✓ Correct answer
B: concentration gradient: steep, diffusion distance: short
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