A-LevelBiologyGas exchange9700/12 · Oct/Nov 2022 · Q371 Mark
What are the functions of cilia in the gas exchange system? 1 to move mucus 2 to trap pathogens and dust 3 to increase the surface area
A1: ✓, 2: x, 3: x, key: ✓ = a function, x = not a function
B1: ✓, 2: ✓, 3: x, key: ✓ = a function, x = not a function
C1: x, 2: ✓, 3: ✓, key: ✓ = a function, x = not a function
D1: x, 2: x, 3: ✓, key: ✓ = a function, x = not a function
✓ Correct answer
A: 1: ✓, 2: x, 3: x, key: ✓ = a function, x = not a function
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