Campbell Biology (10th Edition)
Campbell Biology (10th Edition)
10th Edition
ISBN: 9780321775658
Author: Jane B. Reece, Lisa A. Urry, Michael L. Cain, Steven A. Wasserman, Peter V. Minorsky, Robert B. Jackson
Publisher: PEARSON
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Chapter 55, Problem 4TYU

Level 2: Application/Analysis

4. Nitrifying bactcria participatc in the nitrogen cycle mainly by

(A) converting nitrogen gas to ammonia.

(b) releasing ammonium from organic compounds, thus returning it to the soil.

(C) converting ammonium to nitrate, which plants absorb.

(D) incorporating nitrogen into amino acids and organic compounds.

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Which is false among A-E regarding symbiotic nitrogen fixation? A) O Initiation of the symbiosis involves communication between the plant and bacteria B)O Within the plant, the bacteria differentiate into N2 fixing bacteroids C) O The N2-fixation process is sensitive to oxygen. D) O The bacteria infect the root of the plant via an infection thread. E) O None are false; A-E are all true,
4)  Many bacteria and fungi are important in the environment because they   A) recycle nutrients, making them available for other organisms B) return energy to the environment, making it available for plants C) produce glucose through the process of respiration D) reverse the flow of energy in the ecosystem
All of the following are true about soil microorganismsEXCEPT:(a) They never affect or change the physical characteristicsof their soil microenvironment.(b) They are considered to be a part of the soil.(c) All major microbial taxonomic groups can be found insoil (bacteria, fungi, algae, protists, viruses).(d) Species of the genus Clostridium contain important hu-man pathogens found in soil.(e) They are important as decomposers in the carbon andnitrogen cycles.

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Campbell Biology (10th Edition)

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