edexcel a2 biology revision guide

You may also comment that the difference between the incidence in males and females is largest in the 65-74 age group.
DNA is transferred to a nylon or nitrocellulose membrane by solution drawn up through the gel.
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Questions in these units are designed to be synoptic-in other words, they are designed for you to show knowledge gained in earlier units.
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Remember, too, that if the question is worth 6 marks, you need to make six creditworthy points.
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