Brock Biology of Microorganisms (14th Edition)
14th Edition
ISBN: 9780321897398
Author: Michael T. Madigan, John M. Martinko, Kelly S. Bender, Daniel H. Buckley, David A. Stahl, Thomas Brock
Publisher: PEARSON
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Chapter 19.8, Problem 1MQ
Summary Introduction
The freshwater environments differ essentially in the conditions and
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Glomeromycota help extract resources for plants to grow. The plant provides the
Glomeromycota with carbohydrates in exchange. This is an example of a:
a) Saprotroph
b) Symbiote
c) Predator
d) Parasite
If it were possible to increase nitrogen transport from rhizobia in root nodules to any
part of soybean plants, what implications would this have for agriculture and food?
Which of the following explains why pea plants in high soil nitrogen conditions have
so few rhizobial nodules on their roots?
When there is already high soil nitrogen there is a very large cost to having
rhizobial nodules.
The rhizobia bacteria in the nodules fix nitrogen when there isn't enough in the
soil, so when there is already high soil nitrogen there is no advantage for the pea
plant to expend the extra energy housing the rhizobia.
The rhizobia bacteria in the nodules use nitrogen when there isn't enough in the
soil, so in conditions of high soil nitrogen the plant tries to exclude the rhizobia
to keep the nitrogen for itself.
When there is already high soil nitrogen there is no benefit to the plant to
having rhizobial nodules, which can rob the plant of the high nitrogen supplies
so that the rhizobia bacteria do not have to fix the nitrogen themselves.
Chapter 19 Solutions
Brock Biology of Microorganisms (14th Edition)
Ch. 19.1 - Prob. 1MQCh. 19.1 - Prob. 2MQCh. 19.1 - Prob. 3MQCh. 19.2 - Prob. 1MQCh. 19.2 - What is a biogeochemical cycle? Give an example...Ch. 19.3 - Prob. 1MQCh. 19.3 - Prob. 2MQCh. 19.4 - Prob. 1MQCh. 19.4 - Prob. 2MQCh. 19.4 - Prob. 3MQ
Ch. 19.5 - Prob. 1MQCh. 19.5 - Prob. 2MQCh. 19.6 - Which phylum of Bacteria dominates bacterial...Ch. 19.6 - What factors govern the extent and type of...Ch. 19.6 - Prob. 3MQCh. 19.7 - Prob. 1MQCh. 19.7 - Prob. 2MQCh. 19.8 - Prob. 1MQCh. 19.8 - Prob. 2MQCh. 19.8 - Prob. 3MQCh. 19.9 - What did the Deepwater Horizon spill tell us about...Ch. 19.9 - Prob. 2MQCh. 19.9 - Prob. 3MQCh. 19.10 - How does Ostreococcus differ from Prochlorococcus?...Ch. 19.10 - How does the organism Prochlorococcus contribute...Ch. 19.10 - How does Roseobacter differ from Prochlorococcus?Ch. 19.11 - What is proteorhodopsin and why is it so named?...Ch. 19.11 - Prob. 2MQCh. 19.11 - Prob. 3MQCh. 19.12 - Prob. 1MQCh. 19.12 - What molecular adaptations are found in...Ch. 19.12 - Prob. 3MQCh. 19.13 - How does a warm hydrothermal vent differ from a...Ch. 19.13 - Prob. 2MQCh. 19.13 - Prob. 3MQCh. 19 - Prob. 1RQCh. 19 - Prob. 2RQCh. 19 - Prob. 3RQCh. 19 - Prob. 4RQCh. 19 - Prob. 5RQCh. 19 - Prob. 6RQCh. 19 - In what soil horizon are microbial numbers and...Ch. 19 - Prob. 8RQCh. 19 - Prob. 9RQCh. 19 - Prob. 10RQCh. 19 - Prob. 11RQCh. 19 - Prob. 12RQCh. 19 - Prob. 13RQCh. 19 - REVIEW QUESTIONS
14. What is the difference...Ch. 19 - Prob. 15RQCh. 19 - Prob. 1AQCh. 19 - Prob. 2AQCh. 19 - Global warming has been suggested to result in...
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