Biology: Life on Earth
10th Edition
ISBN: 9780321729712
Author: Gerald Audesirk, Teresa Audesirk, Bruce E. Byers
Publisher: Benjamin Cummings
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Chapter 27, Problem 4AC
Summary Introduction
To review:
Determine if the kangaroo is a keystone species in the Australian outback, through an experiment.
Introduction:
Keystone species are those species that drives the major functions of any ecosystem. They may be less in abundance, but the role played by them in maintaining the ecosystem is of high importance. According to the Paul Ehrlich, their presence is extremely important for the ecosystem.
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How many types of reactions can an enzyme perform?
Your goal is to produce black seeds resistant to mold. So you make the same cross again (between a homozygous black seeded, mold susceptible parent and a homozygous white seeded and mold resistant parent), and, again, advance progeny by SSD to create 100 F10 generation plants.
Based on the information you obtained from your first crossing experiment (Question #4), how many F10 plants would you expect to have black seeds and be resistant to mold?
Assume that a toxin produced by the mold fungus has been isolated. Only mold resistant seeds will germinate in the presence of the toxin. Could you use this toxin screening procedure to have segregation distortion work in your favor in the F2 generation? Explain your answer.
Info from Question 4
a. P Locus (Seed Color):
Hypothesis: The null hypothesis (H₀) is that seed color is controlled by alleles at a single locus.
Observed Data:
Total white seeds: 45 (resistant plants) + 6 (susceptible plants) = 51
Total black seeds: 7 (resistant…
Chapter 27 Solutions
Biology: Life on Earth
Ch. 27 -
1. Organisms that interact serve as agents of...Ch. 27 - Prob. 2FTBCh. 27 - Fill-in-the-Blank Competition occurs whenever two...Ch. 27 - Prob. 4FTBCh. 27 -
5. Fill in the appropriate type of community...Ch. 27 -
6. A somewhat predictable change in community...Ch. 27 - Define an ecological community, and describe the...Ch. 27 - Describe several key ways in which specific plants...Ch. 27 - Explain how resource partitioning is a logical...Ch. 27 - Define parasitism and mutualism and provide an...
Ch. 27 - Define succession. Which type of succession would...Ch. 27 - 5. Provide examples of two climax and two...Ch. 27 - Prob. 7RQCh. 27 - Prob. 8RQCh. 27 - Herbivorous animals that eat seeds are considered...Ch. 27 - Prob. 2ACCh. 27 - As a frogfish sits camouflaged on the ocean floor,...Ch. 27 - Prob. 4AC
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