science exam Flashcards on biology 1A, created by shazzy690 on 21/05/2013.
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Created by shazzy690
about 11 years ago
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Close
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Created by shazzy690
about 11 years ago
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we have different defences to stop us catching pathogens, we have
skin
antibodies
acids
white blood cells
bacteria is living cells and virues are not and are smaller
