Evidence for Evolution Video

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Presentation transcript:

Evidence for Evolution Video http://www.youtube.com/watch?v=lIEoO5KdPvg

Warm up- Pop Quiz Who is this man? Hint- he wrote The Origin of Species What journey changed his life? Where did he go? What did he observe? What is evolution? Why is it important

Warm up What is evidence for evolution? List four examples? What is comparative anatomy? How are genetics used to support evolution?

Species- group of organisms, two individuals can create fertile offspring

Hierarchy of Biological Organization

Vocabulary Evidence of evolution Similar organisms share a common ancestor. Evidence of evolution Fossil record Comparative anatomy- differences and similarities between living things Anatomy- study of the structure of organisms and their parts Embryology- study of how animals development before birth Molecular Biology (DNA)- scientists compare DNA between animals to see how closely they are related Geographic Distribution

Earliest placental mammal- 65 million years ago! Common Ancestors Earliest placental mammal- 65 million years ago!

Fossil Record Information about past life Structure of organisms What they ate What ate them What environment they lived in Time period they lived in

Comparative Anatomy Humerus Ulna/radius Carpal Metacarpal Phalanges

Anatomical Structures Homologous structure- same anatomy, different function Analogous structure- different anatomy, same function Vestigial structure- remnants from a common ancestor, no longer used

Homologous Structures

Analogous Structures

Vestigial Structures

Embryology The early stages, or embryos, of many animals with backbones are very similar.

Genetics

Geographic Distribution Shared a common ancestor, adapt to where they live island species most closely resemble nearest mainland species Population can show variation from one island to another

Gene Pool- genes, or genetic information, in any population, usually of a particular species.

Genetic Drift

4 Principals of Natural Selection/Evolution Individuals in a population have VARIATIONS Variations are INHERITED Not all offspring produced can survive Variations that increase reproductive success will have a greater chance of being passed on