Biology 9700 · AS & A Level · Control and coordination in plants

Control and coordination in plants — practice question

(a)[7]

Explain how auxin contributes to cell elongation in plants.

(b)[8]

Describe the role of abscisic acid in the closure of stomata.

Worked solution & mark scheme

This 15-mark question has a full step-by-step worked solution and mark scheme. One marking point: “The acid-growth hypothesis” …

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