Embryology And Biochemistry

Evidence of Evolution Embryology: the study of how organisms develop  Develop means how the organism changes as it goes from its immature to mature form Organisms that have similar embryology are related Many organisms have similar embryology

Embryology

Biochemistry Study of composition and structure of organic molecules in cells and organisms Study of proteins shows similarities in organisms Similarities indicate closely related organisms

Evidence of Evolution Cellular/molecular evidence: evidence based on the cell All organisms have cells All organisms have similar chemicals that make and control the cells

Genetic Evidence Compare DNA of organisms (base sequences) Organisms with similar DNA are more closely related Timetable of mutations based on rate of mutation can tell when common ancestor existed

Genetic Evidence Mutations cause new alleles in population There is constant change in the alleles of a population Selective breeding: humans use different alleles and choose those organisms they prefer to modify the gene pool of a population

Selective Breeding

Direct Observation Bacteria live quickly enough that we can observe changes Drug-resistant bacteria are the result of mutation