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Evolution Unit

Evolution Unit. Warm-Ups. Warm Up 3 : Relative Ages of Rocks. Determine the relative age of the rock layers (H-Q) Most recent ______ ______ ______ ______ ______ ______ ______ ______ ______ Oldest rock ______ The Law of __________.

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Evolution Unit

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  1. Evolution Unit Warm-Ups

  2. Warm Up 3: Relative Ages of Rocks Determine the relative age of the rock layers (H-Q) Most recent ______ ______ ______ ______ ______ ______ ______ ______ ______ Oldest rock ______ The Law of __________.

  3. Warm-Up 4: Fossil Evidence • In what type of rock are fossils formed? • List the 6 categories of fossils. • How are fossils used as an evidence for change in comparison to modern-day species?

  4. Warm-Up 5: Evolution by Natural Selection • Describe Natural Selection. • In terms of selection, define an organism’s fitness. • What is an adaptation? • Why would a characteristic which contributes to long life, but with few or no offspring, be uncommon in a population? Icefish Adaptations

  5. Warm-Up 6: Bird Beak (Forkbird) Activity • In the Natural Selection of Bird Beaks lab, what was the variation being studied? • How did the gene pool of the forkbirds change after the drought? • Potentially, what could happen if drought conditions continued over a prolonged period of time? What term do we use to describe this form of genetic drift? http://animals.sandiegozoo.org/animals/salamander-newt

  6. Warm-Up 7: Salamanders • What kind of isolation took place in the case of the salamanders?What type of speciation can this lead to? • What occurs when a population reproduces in isolation? • Did it appear that the subspecies with many spots and the subspecies with no spots found in the southern-most part of CA were interbreeding? Explain. • Pocket Mouse Short Film

  7. Quick Quiz: Matching • 4 Tine Genotype • Heterozygous advantage • Prezygotic barrier • Reproductive advantage • Hardy-Weinberg Principle • Genetic Drift Examples (see the next slide to check your answers) • Cheetahs and 6 Fingers • Fireflies mating at different times of the night • BB • The frequency of alleles in populations does not change unless acted upon. • Differences that increase an organism’s reproductive success • Heterozygous for sickle cell anemia

  8. Quick Quiz: Answers 1. C 2. F 3. B 4. E 5. D 6. A

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