10.4 Evidence of Evolution Evidence of Evolution

10.4 Evidence of Evolution The Fossil Record Comparing fossils with living organisms reveals a pattern of gradual change from past to present. *We will never find fossils of every species that ever lived.

10.4 Evidence of Evolution Biogeography Study of the locations of organisms around the world Ostrich (Africa) Emu (Australia) Rhea (South America)

10.4 Evidence of Evolution Movement of land forms can separate a group of organisms into two separate groups

10.4 Evidence of Evolution

Embryology Scientists compare embryos to look for similar patters and structures

10.4 Evidence of Evolution Anatomy Scientists compare body structures of different species –Homologous structures are similar in structure but different in function. –Evidence of a common ancestor

10.4 Evidence of Evolution Human hand Bat wing Mole foot Fly wing –Analogous structures are not evidence of a common ancestor. –Analogous structures have a similar function.

10.4 Evidence of Evolution Vestigial structures are remnants of organs or structures that had a function in an early ancestor. (Ostrich wings, wisdom teeth, appendix, whale pelvic/leg bones)

10.4 Evidence of Evolution Biochemistry Comparing genes between species AGTCCCGTAGGTCGATGTGGGTAAAAGCTTGATCG AGTCCCGTACGTCGATGTGGGTATAAGCTTGATCG

10.4 Evidence of Evolution How similar is human DNA to a…? 98% 50%