C8e_24_Test_Bank - Biology 8e(Campbell Chapter 24 The...

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Biology, 8e (Campbell) Chapter 24 The Origin of Species Multiple-Choice Questions 1) Which of the following statements about species, as defined by the biological species concept, is (are) correct? I. Biological species are defined by reproductive isolation. II. Biological species are the model used for grouping extinct forms of life. III. The biological species is the largest unit of population in which successful reproduction is possible. A) I only B) II only C) I and III D) II and III E) I, II, and III Answer: C Topic: Concept 24.1 Skill: Knowledge/Comprehension 2) What is generally true of two very closely related species that have diverged from each other quite recently? 3) Which of the various species concepts distinguishes two species based on the degree of genetic exchange between their gene pools? 4) Which species concept is currently most popular among most biologists? 1
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5) There is still some controversy among biologists about whether Neanderthals should be placed within the same species as modern humans, or into a separate species of their own. Most DNA sequence data analyzed so far indicate that there was probably little or no gene flow between Neanderthals and Homo sapiens . Which species concept is most applicable in this example? A) phylogenetic B) ecological C) morphological D) biological Answer: D Topic: Concept 24.1 Skill: Application/Analysis 6) A biologist discovers two populations of wolf spiders whose members appear identical. Members of one population are found in the leaf litter deep within the woods. Members of the other population are found in the grass at the edge of the woods. The biologist decides to designate the members of the two populations as two separate species. Which species concept is this biologist most closely utilizing?
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