Study Guide for Campbell Biology
11th Edition
ISBN: 9780134443775
Author: Lisa A. Urry, Michael L. Cain, Steven A. Wasserman, Peter V. Minorsky, Jane B. Reece, Martha R. Taylor, Michael A. Pollock
Publisher: PEARSON
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Textbook Question
Chapter 24, Problem 13TYK
This chapter introduced several research studies that illustrate various aspects of
- a. Two closely related species of monkey flowers have different pollinators (bumblebees and hummingbirds). Transferring an allele for flower color between the two species resulted in both types of pollinators visiting flowers with the transferred flower allele. Thus, this reproductive barrier based on pollinator choice may have been influenced by a change in a single gene locus.
- b. The apparent stability of the hybrid zone between two species of Bombina toads may relate to the narrow width of the zone. Even though hybrid toads have increased rates of embryonic mortality and a variety of morphological abnormalities, members of both parent species continue to migrate into the zone, leading to the production of hybrids.
- c. Populations of mosquitofish inhabit ponds in the Bahamas. In ponds that contain predatory fishes, natural selection has favored a body shape that facilitates rapid bursts of speed. In mate choice experiments, female mosquitofish choose males with body shapes similar to their own. The reproductive isolation between populations is forming as a by-product of natural selection for predator avoidance.
- d. In the many species of cichlids found in Lake Victoria, the reproductive barriers between species as a result of female mate choice based on male coloration appear to be breaking down because the introduced Nile perch is a strong predator of cichlids.
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In the fly speciation experiment described in class, Drosophila from a single culture was split into four isolated cultures, 2 raised on maltose food and two on starch food. After forty generations all possible crosses were done between maltose and starch flies and between the two starch populations. Flies from different food types had very low mating frequencies compared to flies from the same food type but flies from different starch populations only mated at a very slightly lower rate than flies from the same starch population. How would you interpret this finding?
There are two different phenotypes of a moth species, black and light grey, which are
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Reduced pollution in the area has turned the trees (where the moths live) lighter. Which moth
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Select one:
O a. DD only
O b. Dd only
c.
dd only
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O e. DD and dd
Of.
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Why does sympatric speciation via allopolyploidy occur?
A. When disruptive selection and assortative mating act contemporaneously (during the same time)
B. When strong prezygotic isolation prevents hybridization between two species
C. When meiotic error in a single species results in unreduced gametes that can self-fertilize
D. When individuals of two species mate and their offspring are sterile but eventually produce unreduced gametes that self-fertilize
O E. When geographic isolation and natural selection occur contemporaneously
Chapter 24 Solutions
Study Guide for Campbell Biology
Ch. 24 - Prob. 1IQCh. 24 - Fill in the following table to review three of the...Ch. 24 - a. A new plant species 8 forms by autopolyploidy...Ch. 24 - a. Differentiate between allopatric and sympatric...Ch. 24 - Use the following diagrams to explain the three...Ch. 24 - Prob. 6IQCh. 24 - Prob. 1SYKCh. 24 - Prob. 2SYKCh. 24 - What does the term punctuated equilibria describe?Ch. 24 - Prob. 1TYK
Ch. 24 - Prob. 2TYKCh. 24 - Prob. 3TYKCh. 24 - Which of the following is not a mechanism...Ch. 24 - Prob. 5TYKCh. 24 - Prob. 6TYKCh. 24 - Prob. 7TYKCh. 24 - Prezygotic barriers to reproduction between...Ch. 24 - A botanist identifies a new species of plant that...Ch. 24 - Which of the following would not contribute to...Ch. 24 - Morphological and genetic comparisons group 30...Ch. 24 - Prob. 12TYKCh. 24 - This chapter introduced several research studies...
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