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.
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