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biology 0610printed 133 · PDF 133
328 pagesrevision 46933
printed 133 · PDF 133
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The diagram shows some parts from the blood of a mammal.
Which part would contain the breakdown products of bacterial cells?
A B c
@
Which are both chemical barriers to the transmission of pathogens?
mucus and stomach acid
B mucus and white blood cells
C skin and hairs in the nose
D skin and stomach acid
Which is a mechanical barrier to pathogens?
acid in the stomach
B hairs in the nose
C mucus in the trachea
D phagocytosis in the blood
Which disease is caused by bacteria?
AIDS
cholera
obesity
oo 90
scurvy
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