Evolution/Adaptations MA Curriculum Strands 10. Give examples of ways in which genetic variation and environmental factors are causes of evolution and the diversity of organisms. 11. Recognize that evidence drawn from geology, fossils, and comparative anatomy provides the basis of the theory of evolution. 12. Relate the extinction of species to a mismatch of adaptation and the environment.

Define the following: Species Evolution Variation Adaptation Gradualism Punctuated Equilibrium

Describe Natural Selection See page 159. Copy the Table 1 and summarize

Compare and Contrast Acquired Characteristics with Natural Selection 1.Organisms have more offspring, much more than can survive. 2. Variations occur among the species. Ex: different colored fur on rabbits 3. Variations are passed to offspring. (Babies) 4. Some variations are helpful… those with these variations have a reproductive edge. 5. Over time individuals w/variations dominate the population…become a separate species Natural Selection Hypothesis: Acquired Characteristics Characteristics developed during a parent’s lifetime will be passed to the offspring. Ex: bodybuilders creating a muscular child-False Both explain how organisms change over time! Same

Evolution Summary Evolution is the result of random mutations in a species. Mutations = Variations Helpful variations = Adaptations Adaptations give organisms an advantage and they reproduce and pass these traits down and eventually dominate and over very long periods of time become a new species. Environmental pressures = Space, food, predators. Can be a slow or rapid process

Evidence for Evolution Group 1 Fossils 165 - 166 Group 2 Aging & Embryology 167 - 169 Group 3 Homologous Vestigial Structures DNA 170 -171