21) 21) After surviving a bottleneck, a population recovers to the point where i

Question

21) 21) After surviving a bottleneck, a population recovers to the point where it consists of as many individuals as it did prior to the bottleneck. Which of the following statements is most likely to apply to this population? A) The postbottleneck population exhibits more genetic variation than the prebottleneck pulation. postbottleneck population exhibits less genetic variation than the prebottleneck population 9) The bottleneck subjected the population to stabilizing selection. D) The postbottleneck population has less of a chance of going extinct than did the prebottlenedk population 22) What hypothesis did Luis and Walter Alvarez test in relation to the mass extinction ion years ago (MYA)? mass extinction 65 MYA was caused by an impact of an extraterrestrial object. B) The mass extinction 65 MYA was caused by a surge of catastrophic cyclones C) The mass extinction 65 MYA was caused by the loss of preferred plants for food. D) The mass extinction 65 MYA was caused by a slow but steady increase in climate temperatures 23) 23) evidence of B) paedomorphosis D) convergent evolution h common ancestr 24) 24) Mass Extinction movie: The KT Boundary is a layer of clay between two layers of rock. The rock below contains many forams. The rock above does not, thus providing evidence of a large extinction event. A) True B) False

Explanation / Answer

21. D. The post-bottleneck population has less of a chance of going extinct than did the pre-bottleneck population.

22. A. The mass extinction 65 MYA was caused by an impact of an extraterrestrial object.

23. Homology- A. common ancestry.

24. A true. KT boundary is a layer of clay between two layers of rocks

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