Ch-24-Test-questions - Biology, 8e (Campbell) Chapter 24...

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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 2) What is generally true of two very closely related species that have diverged from each other quite recently? A) They shared a common ancestor recently in evolutionary time. B) Genes are unable to pass from one species' gene pool to the other's gene pool. C) They are unable to produce hybrid offspring upon interbreeding. D) Their reproductive isolation from each other is complete. 3) Which of the various species concepts distinguishes two species based on the degree of genetic exchange between their gene pools? A) phylogenetic B) ecological C) biological D) morphological 4) Which species concept is currently most popular among most biologists? A) phylogenetic B) ecological C) biological D) morphological 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 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? A) ecological B) biological C) morphological 1
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D) phylogenetic 7) What was the species concept most used by Linnaeus? A) biological B) morphological C) ecological D) phylogenetic 8) You are confronted with a box of preserved grasshoppers of various species that are new to science and have not been described. Your assignment is to separate them into species. There is no accompanying information as to where or when they were collected. Which species concept will you have to use? A) biological B) phylogenetic C) ecological D) morphological The questions below are based on the following description. Several closely related frog species of the genus Rana are found in the forests of the southeastern United States. The species boundaries are maintained by reproductive barriers. In each case, match the various descriptions of
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This note was uploaded on 02/25/2011 for the course BIO 1105 taught by Professor Dawkins during the Spring '10 term at McKendree.

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Ch-24-Test-questions - Biology, 8e (Campbell) Chapter 24...

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