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Evolution (the review)

Evolution (the review).

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Evolution (the review)

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  1. Evolution(the review)

  2. 1. A population of snails live on grey colored rocks at the beach. The variation of shell color ranges from very light to very dark. Dark and light colored shells are easily seen and caught by seagulls. Over time, there are fewer light and dark colored snails and most of the population is grey. This is an example of which type of selection? • Directional Selection • Stabilizing Selection • Disruptive Selection • Artificial Selection

  3. 2. Isotope X has a half-life of 2,000 years. After 8,000 years, what fraction of the isotope will remain • ½ • 1/3 • ¼ • 1/8 • 1/16 • No radioactive sample will remain

  4. 1st half life- ½ of sample remains 2nd half life- ½ of the remaining ½ decays – leaving ¼ 3rdhalf life- ½ of the remaining ¼ decays – leaving 1/8 4thhalf life- ½ of the remaining 1/8 decays – leaving 1/16

  5. 3. These pictures show examples of what type of structures? The inheritance of this pattern was passed down from common ancestors. • Analogous structures • Homologous structures • Vestigial structures

  6. 4. The picture to the left shows an example of what type of evolution? • Convergent Evolution • Divergent Evolution • Coevolution

  7. Increasingly different gene pools from a common ancestor= divergent evolution.

  8. 5. Polar bear fur color is an example of what type of adaptation? • Mimicry • Camouflage • Vestigial structure

  9. 6. Which islands did Charles Darwin travel to when he went on his famous trip onboard the Beagle? • Hawaiian • Galapagos • Cook • Marshall

  10. 7. Which of the following is NOT a requirement for natural selection? • variation must exist for the trait • the trait must be heritable • the trait must lead to differences in survival and/or reproduction rates • the trait must make the organism stronger

  11. 8. This rate of evolution proposes that speciation may occur in rapid bursts followed by long periods of stability. • Gradualism • Punctuated Equilibrium

  12. 9. The process in which humans change the gene pool of a species through specific mating of the plants/ animals with desirable traits. • Artificial Selection • Selective Breeding • Sexual Selection • A and B • B and C • All of the above

  13. 10. If an organism is bipedal, that means they can: • Walk on two legs • See in 3-Dimensions • Grasp objects with their thumb and fingers • Ride a bicycle.

  14. 11. Consider the picture below. The oldest layer of sediment is on the bottom. Which law describes this? • Law of sediment • Law of layers • Law of superposition • Law of ages

  15. 12. Which of the following is an example of a vestigial structure? • Ostrich wing • Eagle wing • Bat wing

  16. 13. Which of the following is an example of mimicry? • A______ • B.____ • C

  17. 14. The dolphin, a shark, and an ichthyosaur shown in the picture have a similar body shape. The closer relatives of dolphins and ichthyosaurs did not have this shape. This is due to which type of evolution? • Coevolution • Divergent Evolution • Stabilizing Evolution • Convergent Evolution

  18. 15. What led to speciation occurring with the two populations of owls shown in the picture? • Stabilizing Selection • Disruptive Selection • Directional Selection • Geographic Isolation

  19. 16. When would convergent evolution occur? • If two species face different selective pressure. • If two species face similar selective pressure. • If two species are living in close association and are acting as a selective pressure on the other species.

  20. Convergent Evolution Ancestor to Birds Ancestral Mammal

  21. 17. The graph below shows the beak size distribution for a bird species (with 10 mm being the average size). If the size of the available seeds increases so that beaks longer than 10 mm are an advantage for survival, what process is occurring? • Disruptive selection • Stabilizing selection • Directional selection • Convergent evolution

  22. 18. DNA sequencing is considered more reliable than anatomical comparisons (how similar the body structures are) in determining the evolutionary relationship of species because of the possible effects of … • Divergent evolution • Convergent evolution • Coevolution • Disruptive selection

  23. 19. Isotope Y has a half life of 100 years. If the initial sample of isotope Y is 200 grams, after 300 years how much of the radioactive isotope should remain? • None • 12.5 grams • 25 grams • 50 grams • 66 grams • 100 grams

  24. With a half life of 100 years, a time span of 300 years = 3 half-lives. After 3 half-lives, 1/8 is left. 1/8th of the starting amount of 200 grams= 25 grams

  25. 20. I am going to rock this test! • True • False

  26. B • E • B • B • B • B • D • B • D • A • C • A • C • D • D • B • C • B • C • A

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