CAIE A Level Biology 9700 · Control and coordination
During barley seed germination, gibberellin is essential for mobilising stored food reserves. Describe the role of gibberellin in this process, including the origin of the hormone, its target cells, and the resulting biochemical changes.
5 marks, so the mark scheme is looking for about 5 separate creditworthy points. Making the same point twice in different words earns it once.
Describe means: Say what happens or what something is like, in order and with detail. You are not being asked why. If there is data, quote it: name the trend, then give figures with units at the points where it changes.
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