Agenda: Warm-Up Review

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Agenda: Warm-Up Review March 29, 2018 EQ: How do species evolve due to natural selection? Warm-Up: Which organisms have four limbs? Which have hair? Agenda: Warm-Up Review

Explain the relationship between: -genetics -natural selection -evolution

Sect 1- Change Over Time Adaptation Species Evolution

Evidence of Changes Over Time Fossils What type of rocks? Where do you find the newest fossils? Oldest? Extinction Relative dating What evidence does the fossil record show?

Absolute/Radiometric dating Half-life C-14 N 1 (5,730 y) 100 g 0 g 2 (11, 460 y) 50 g 3 (17,190 y) 25 g 75 g 4 (22,920 y) 12.5 g 87.5 g Carbon-14 decays into Nitrogen Half-life of Carbon-14 is 5,730 years

Absolute Dating When determining the age of Older fossils, scientists use Uranium isotopes. Uranium Decays Into Lead.

Rates of Evolution Punctuated Equilibria vs. Gradualism (Microevolution) (Macroevolution)

Evidence of Ancestry and Evolution What bones show whales are related to land mammals? DNA Embryology Homologous structures Fossils

How Does Evolution Happen? Natural Selection -overproduction -variations -competition -successful reproduction ***Finches! ***Peppered Moths! What causes variations? How is genetics related to evolution? When do 2 populations evolve into 2 different species?