Unit 4 Answers - Unit 4 Answer KEY: Lectures 31-40 These...

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1 These are the Qwizdom and short answer Qs that were presented in BIO 171 lectures 31 through 40. The review session will be held on Saturday, April 19 (3 to 5pm) in Nat. Sci. Aud. Remember Exam 4 is on Tuesday, April 22 from 7 to 9pm. Advice: Don’t focus on memorizing the answer but focus on understanding why that answer was the best out of the choices given. What was wrong with all of the other choices? Unit 4 Answer KEY: Lectures 31-40 Q: Scarlet gilia (an angiosperm) most commonly has bright red flowers. In a population in Arizona, most of the flowers are red in early summer when the major pollinators are hummingbirds. However, in late summer, the same plants produce flowers that are mostly light pink or white and the major pollinators at this time are hawk moths which feed nocturnally. In late summer, the biologists painted some of the red flowers white. What do you predict would happen? A. Unpainted red flowers would produce more fruits than white flowers would. B. Red flowers that were painted white would produce more fruits than red flowers would. C.Red and white flowers would produce the same number of fruits. D.None of the above. Answer = B Q: What is an essential part of alternation of generations in plants? A.meiosis to produce gametes B.meiosis to produce zygotes C.mitosis to produce gametes D.fertilization to produce spores E.fertilization to produce gametes Answer = C Q: When bone first evolved in vertebrates, what structure did it form? A. endoskeleton B. exoskeleton C. vertebrae D. skull E. jaw Answer = B; look at the timeline that discusses various fish lineages from fossil record – note that these fossil fish lineages are not included in the chordate phylogeny Q: What is the diagnostic feature of verebrates ( i.e., what trait do all vertebrates share)? A. cranium (skull) B. jaws C. endoskeleton made up of bone D. exoskeleton made up of cartilage E. exoskeleton made up of bone F. vertebrae made up of bone Answer = A Q: Researchers agree that modern Homo sapiens originated in Africa and then spread throughout Europe, Asia and eventually the Americas. What do they disagree about? A. whether the original African population of H. sapiens
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This note was uploaded on 12/06/2009 for the course BIO 225 taught by Professor Pavgi during the Spring '08 term at University of Michigan.

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Unit 4 Answers - Unit 4 Answer KEY: Lectures 31-40 These...

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