BIOA01H3 Lecture Notes - Lecture 7: Cyanobacteria, Chromosome, Archaeopteryx

• School: UTSC
• Department: Biological Sciences
• Course: BIOA01H3
• Professor: Mark Fitzpatrick

Document Summary

Populations change over hundreds and thousands of years. One species splits into two or more species. Splitting of lineages from one ancestral form. Much of evolutionary change was caused by natural selection. All chromosomes contain one gene that is necessary. It was lost, we didn"t need those genes. When god made us he distributed the genes differently. didn"t need as many chromosomes. Dark to light patterns determines how much dna is packed in there. If life originated on earth in the distant past and then evolved, we should see evidence in the fossil record. If evolution occurred within lineages, and those lineages sometimes split then we should see change in species or morphology through fossil record. If creatures share a common ancestry, then we should see transitional forms. We should see evidence of retrodictions and vestigial characters. We should be able to see evidence of natural selection.