• evolution: is the change in the new forms of organisisms
as well as: change in the frequency of alleles
• natural selection: the mechanism of evolution
staphlococcus aureus: causes skin infections and lung infections, associated with infected wounds, in particular wounds in operations
the original form of staphlococcus aureus is susceptible to methecilline (antibiotic)
MSSA (methecilline susceptible to staphlococcus aureus): 100% in the original form
a random mutation was able to break down methecilline, making it resistant towards the antibiotic, which keeps on increasing (the allele that can resist the antibiotic is increasing and becoming more common).
• Random muation (the MRSA form)
• non-random selection (antibiotic)
these 2 components are features of natural selection
natural selection is a process, not a thing
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