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1) Within a population there is variation among individuals
2) Some of these individuals will be better suited to survive in their environment
3) These individuals are more ...
1) Dead/Inactive/Attenuated Microorganisms activate immune response
2) White blood cells produce antibodies
3) Antibodies kill microorganisms
4) This allows fo...
Enzymes are molecules in the body that break down specific substrates which can then be used for energy or stored. An enzyme contains an active site that is complementary in shape to the substrate bein...
People are immunised against pathogens through vaccination - usually an injection.
A vaccine is comprised of dead, inactive or weakened...
This question crops up a lot and may be up to a five mark question, if you learn the key points and terms you can be confident of getting all the marks you can here!
First of all, SMAnswered by Sarah M. • Biology tutor5205 Views
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