Evolution. Origin of Life and Speciation. Explain how the giraffe could have evolved :. What is Natural Selection?. Who came up with the theory of natural selection? Name some criteria necessary for natural selection to occur. Name types of evidence for evolution.
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Origin of Life and Speciation
1- contain DNA similar to bacterial DNA
2- have ribosomes of similar size and structure to those of bacteria
3- reproduce by binary fission like bacteria
Gradual: slow and steady change
Punctuated: long, stabile periods interrupted by brief periods of rapid change