THE EVIDENCE FOR EVOLUTION

THE EVIDENCE FOR EVOLUTION - THE EVIDENCE FOR EVOLUTION: AN...

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THE EVIDENCE FOR EVOLUTION: AN OVERVIEW Diversity and Adaptation Not (by themselves) good evidence: genetic basis; creationism; Intellegent design theory Change over Time Fossil horses : Gradual changes in toe number, body size, skull morphology. Clear linear (actually sequential hierarchical) sequence. Correspondence of Jaw/tooth morphology to habitat changes. Extinct/Extant mammals : the extinct forms on any continent are closely related to the extant forms on that continent. Australia: extinct Tertiary mammals are mostly marsupials, as are the extant ones. South America: extinct Quaternary mammals are prominently armadillos and sloths, as in the extant fauna Industrial melanism The peppered moth Biston betularia : Preindustrial times the melanic forms were about 1% in museum collection; post industrial times the melanics had reached 90% in some areas. Dramatic frequency change of an allele at a single Mendelian locus in 100 years. Kettlewell placed the different colored moths on tree trunks of different background color and showed that
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THE EVIDENCE FOR EVOLUTION - THE EVIDENCE FOR EVOLUTION: AN...

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