CAIE A Level Biology 9700 · The mitotic cell cycle
A student is studying mitosis in onion root tip cells. They observe cells at various stages. Describe the sequence of events that occur to the chromosomes and the nuclear envelope from the end of interphase to the beginning of cytokinesis. Include the names of the four main stages in your answer.
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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