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Mastery Packet IB Biology II, Q5 1) Which combination of the following species characteristics would cause the greatest likelihood of fossilization in sedimentary rock? I. aquatic II. tropical III. hard body parts IV. presence of organic material V. flight VI. long duration as a species A) I, II, and VI B) I, III, and VI C) II, IV, and V D) II and VI E) III only 2) Which of the following should not be considered fossils? A) All of the below are properly considered fossils. B) insects enclosed in amber C) mammoths frozen in arctic ice D) dinosaur footprints preserved in rocks E) ancient pollen grains in lake sediments 3) Which of the following can be used to determine the absolute age of fossils? A) the half-life of isotopes B) cladistics C) index fossils D) racemization E) sedimentary strata 4) If the half-life of carbon-14 is about 5,730 years, then a fossil that has one-eighth the normal proportion of carbon-14 to carbon-12 is probably __________ years old. A) 1,400 B) 2,800 C) 11,200 D) 16,800 E) 22,400 5) Theoretically, how can absolute dates be determined by radiometric means? By measuring A) the accumulation of the daughter isotope. B) the loss of parental radioisotopes. C) the loss of the daughter isotope. D) all three of these. E) only A and B. 6) How many half-lives should have elapsed if 12.5% of the parental radioisotope remains in a fossil at the time of analysis? A) one B) two C) three D) four E) five 7) A new plant species formed from the hybridization of a plant with a diploid number of 16 with a plant with a diploid number of 12 would probably have a gamete chromosome number of A) 22. B) 16. C) 14. D) 12. E) 28. 8) A biologist discovers two new species of organisms, one in Africa and one in South America. The organisms resemble one another closely. Which type of evidence would probably be least useful in determining whether these organisms are closely related or are the products of convergent evolution? A) the fossil record of the two species B) the history and timing of continental drift C) comparative embryology D) a comparison of DNA from the two species E) analysis of the behavior of the two species 1 9) If this evolutionary tree turns out to be a faulty depiction of relatedness because the common ancestor at position number four never existed, and if all of the other species depicted here continue to be placed in the same genus, then A) this genus is unacceptable, according to cladistics. B) this genus is still accurate, but only if the genealogical species concept is applied. C) this genus includes species whose similarities may be due to analogies rather than to homologies. D) all three of these are correct. E) only A and C are correct.... View Full Document

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