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Discover the fossil record, geographical distribution, homologous structures, and embryology in evolution. Learn how natural selection acts on genes and about the struggle for existence among species. Explore fossils, vestigial organs, and homologous body structures.
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Evidence of Evolution • found in the fossil record • the geographical distribution of living species • homologous structures of living organisms • similarities in early development or embryology.
Natural Selection • Acts directly on the genes (test question) • The struggle for existence means that members of each species compete regularly to obtain food, living space, and other necessities of life.
Fossils include(test question) • Eggs • Footprints • Body parts
vestigial organs(test question) • The organs of many animals are so reduced in size that they are just vestiges, or traces, of homologous organs in other species • vestigial organs may resemble miniature legs, tails, or other structures.
Assignment Page 389 2,3,5,6,9, 21,22,23,24