BIO120H1 Chapter Notes - Chapter 3-4: Arrector Pili Muscle, Continental Drift, Pseudogene
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BIO120H1 Full Course Notes
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Document Summary
Species that live in similar habitats experience similar selection pressures from the environment, so they may look/behave very alike although they are unrelated. They still retain key differences that give clues to their distant ancestry. It demonstrates three parts of evolutionary theory working together: common ancestry, speciation, and natural selection. Continental: once connected to a continent but later separated either by rising sea levels or by moving continental plates. Of 28 species of birds on gal pagos, 14 belong to gal pagos finches: small flowering plants on oceanic islands can be freed from competition with larger trees, and evolve into trees themselves. They are missing many groups of species that live on continents and continental islands (ex: amphibians, mammals, fish, and reptiles) Fish and shark embryos develop, arches become jaw and gill structures. Women give birth to child from pelvis instead of lower abdomen.
