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

Control and coordination in plants — practice question

(a)[8]

Describe how abscisic acid (ABA) is involved in the closure of a stoma.

(b)[7]

Describe how gibberellins act during the germination of barley seeds.

Worked solution & mark scheme

This 15-mark question has a full step-by-step worked solution and mark scheme. One marking point: “ABA functions as a stress hormone” …

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