Thursday, October 6, 2011

Obj - 3.31 Evolution

Describe the process of evolution by means of natural selection 

1. Evolution : a) change in the form of organisms - b) change in frequency of alleles. 
2. Natural slelection: is the system of evolution. (introduced by Charles Darwin)
3. Change in allele frequency by natural selection:
example: Staphylococcus aueurs.
*Susceptible: likely to be harmed by 
 2 features of classic process of  natural selection 
1. Random mutation - produces the MRSA resistant form
2. Non-random selection - due to the antibiotic which is selecting the MRSA (methecilline antibiotic) survive and the MSSA to be selected and killed.

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