CAIE A Level Biology 9700 · Control and coordination
Barley seeds store food reserves in the endosperm as starch. During germination, the embryo produces gibberellin. Describe how gibberellin brings about the mobilisation of these starch stores to provide sugars for the growing seedling.
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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