Microbiology: An Introduction
11th Edition
ISBN: 9780321733603
Author: Gerard J. Tortora, Berdell R. Funke, Christine L. Case
Publisher: Benjamin Cummings
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Chapter 27, Problem 6R
Summary Introduction
To review:
The symbiotic relationship of cyanobacteria, mycorrhizae, Rhizobium and Frankia with their respective hosts.
Introduction:
In a symbiotic relationship, both organisms associating with each other are mutually benefitted. Nitrogen-fixing bacteria provide nitrogen, which is essential for organisms in amino acid synthesis, and in return the host provides a habitat; an anaerobic condition and nutrients necessary for bacterial growth. The process which is involved in the conversion of atmospheric nitrogen into ammonia is known as nitrogen fixation. The reaction is catalyzed by an oxygen-sensitive nitrogenase enzyme.
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The microorganisms responsible for symbiotically fixing nitrogen in the nodules on
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Mycorrhizal fungi form obligate symbiotic relationships within plants. They are able to fix N2 into a usable form of nitrogen. In exchange, they receive nutrition from the plant. Which of the following is a true statement concerning mycorrhizal fungi?
a) Finding a host plant is not crucial to their survival.
b) They are a dominant species.
c) They cannot survive without the host plant.
d) They are considered plant parasites.
Give a complete definition of mycorrhizae, citing the two main classes and the differences between them.
Chapter 27 Solutions
Microbiology: An Introduction
Ch. 27 - The koala is a leaf-eating animal. What can you...Ch. 27 - Give one possible explanation of why Penicillium...Ch. 27 - In the sulfur cycle, microbes degrade organic...Ch. 27 - Why is the phosphorus cycle important?Ch. 27 - DRAW IT 5. Identify where the following processes...Ch. 27 - Prob. 6RCh. 27 - Outline the treatment process for drinking water.Ch. 27 - Prob. 8RCh. 27 - Bioremediation refers to the use of living...Ch. 27 - NAME IT 10. These nitrogen-fixing prokaryotes...
Ch. 27 - Prob. 1ACh. 27 - Explain the effect of dumping untreated sewage...Ch. 27 - Activated sludge system a. the process takes place...Ch. 27 - Prob. 2MCQCh. 27 - Nitrogen fixation a. the process takes place under...Ch. 27 - Prob. 4MCQCh. 27 - The water used to prepare intravenous solutions in...Ch. 27 - CO2+H2SLightLightC6H12O6+S0 a. aerobic respiration...Ch. 27 - Prob. 7MCQCh. 27 - CO2+8H++8eCH4+2H2O a. aerobic respiration b....Ch. 27 - Prob. 9MCQCh. 27 - Coliforms are used as indicator organisms of...Ch. 27 - Flooding after two weeks of heavy rainfall in...Ch. 27 - The bioremediation process shown in the photograph...
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Need a deep-dive on the concept behind this application? Look no further. Learn more about this topic, biology and related others by exploring similar questions and additional content below.Similar questions
- 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,arrow_forwardGive the significance of mycorrhizal association to the host plant and to the fungi.arrow_forwardWhich of the following statements is true regarding mycorrhizal relationships? this relationship is a type of parasitism bacteria partner with plant roots fungi provide energy (ATP) for their partner all glomeromycota are mycorrhizal fungi no statements above are truearrow_forward
- Why would it be disadvantageous for a plant to form a symbiotic relationship with a mycorrhizal fungus when phosphate is abundant in the soil surrounding its roots?arrow_forwardPlace the following events of the SEXUAL lifecycle of a Basidiomycota in chronological order from a spore landing on a substrate through the production of a spore.Basidiospore lands on a substrate Options: plasmogamy, heterokaryotic hyphae/mycelium, meiosis, heterokaryotic fruiting body, karyogamy within a basidium, haploid hyphaearrow_forwardWhat are mycorrhizae? a) The bodies of fungi, composed of hyphae b) fungi that attack plant roots, causing disease C) fungal hyphae that are massed together into stringlike structures d) fungi that have symbiotic partnerships with algae or cyanobacteria e) mutually beneficial associations of particular fungi and plant rootsarrow_forward
- Which of the following would be an example of a microbial chemoautotroph? A yeast using oxidation/reduction of organic compounds as the energy source and organic compounds as the carbon source. An archaean using oxidation/reduction of inorganic compounds as the energy source and a organic compounds as the carbon source. A cyanobacterium using light as the energy source and CO2 as the carbon source. A bacterium using oxidation/reduction of inorganic compounds as the energy source and CO2 as the carbon source.arrow_forwardDescribe the two symbiotic relationships between a fungus and another organism along with the explanation that how each partner is affected by the association.arrow_forwardFungi play a variety of roles in the ecosystem. Discuss briefly each of the following roles stated below. Give specific examples whenever possible. 1. Decomposers 2. Mycorrhizae 3. Lichen Symbiont 4. Endophyte 5. Plant Pathogenarrow_forward
- Mycorrhiza is an example of what?arrow_forwardWhich of the following correctly matches the protist to the mode of nutrition? Chara- Autotrophy, Euglena - Mixotrophy, Amoeba - Heterotrophy Chara - Heterotrophy, Euglena - Mixotrophy, Amoeba - Heterotropy Chara - Mixotrophy, Euglena- Heterotrophy, Amoeba - Autotrophy They all are capable of Heterotrophyarrow_forwardExplain symbiotic activities of fungi.arrow_forward
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