Evidence of Evolution Multiple lines of evidence support the theory

Objectives Describe how fossils provide of evidence of evolution. Discuss morphological evidence of evolution. Explain how biochemistry provides evidence of evolution.

Fossil evidence Fossils provide a record of species. Not all extinct fossils have modern counterparts.---some species remain unchanged. Intermediate fossils—developed transitional forms between species. 1.ancestral traits—evolved from a common ancestor. 2.derived traits—newly developed traits

Comparative Anatomy Homologous structures—similar structures inherited from a common ancestor. Vestigial structure—are the reduced forms of functional structures in other animals. Analogous structures—superficially similar in construction, but not inherited from a common ancestor. Beetle wings/ eagle wings

Comparative Embryology Vertebrate provide glimpse into evolutionary relationships. Comparative biochemistry—shared metabolic molecules that many different organisms share. Patterns in biochemistry of proteins—DNA and RNA.

Geographic distribution Darwin realized that the mara occupied a niche similar to that the rabbit inhabited in Europe. However, it was more closely to other South American species than it was to the rabbit in Europe. Biogeography—the distribution of plants and animals around the world.

Adaptations Fitness is a measure of the relative contribution an individual trait makes to the next generation. Camouflage— Mimicry— Consequences of adaptation—spandrel example and the human example

Homework P. 420 Study for quiz, Friday