Biology 5090 · O Level · Diffusion and osmosis

Diffusion and osmosis — practice question

(a)[7]

Define osmosis and explain why it counts as a distinctive form of diffusion.

(b)[3]

Explain the importance of active transport in the human alimentary canal.

Worked solution & mark scheme

This 10-mark question has a full step-by-step worked solution and mark scheme. One marking point: “net movement of water molecules” …