BIOLOGY
12th Edition
ISBN: 9781260169614
Author: Raven
Publisher: RENT MCG
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Chapter 27, Problem 4S
Soil-based nitrogen-fixing bacteria appear to be highly vulnerable to exposure to UV radiation. Suppose that the ozone level continues to be depleted, what are the long-term effects on the planet?
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Which of these are known to host chemosynthetic communities?
a) Hydrothermal vent
O b) Hydrocarbon seep
c) Hypersaline seep
d) All of the above.
Which is false among A-E regarding symbiotic nitrogen fixation?
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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,
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Chapter 27 Solutions
BIOLOGY
Ch. 27.1 - Prob. 1LOCh. 27.1 - Prob. 2LOCh. 27.1 - Describe classification systems for prokaryotes.Ch. 27.2 - Prob. 1LOCh. 27.2 - Prob. 2LOCh. 27.2 - Prob. 3LOCh. 27.3 - Prob. 1LOCh. 27.3 - Prob. 2LOCh. 27.3 - Prob. 3LOCh. 27.4 - Describe the metabolic strategies employed by...
Ch. 27.4 - Compare and contrast the ways prokaryotes can...Ch. 27.5 - Describe the role of prokaryotes in biogeochemical...Ch. 27.5 - Prob. 2LOCh. 27.5 - Prob. 3LOCh. 27.6 - Prob. 1LOCh. 27.6 - Prob. 2LOCh. 27.6 - Prob. 3LOCh. 27 - Data analysis If the excision of an F plasmid Is...Ch. 27 - Prob. 1IQCh. 27 - Prob. 1UCh. 27 - A bacteria that obtains carbon from the atmosphere...Ch. 27 - Prob. 3UCh. 27 - Bacteria and archaebacteria may be distinguished...Ch. 27 - Prob. 5UCh. 27 - Prob. 6UCh. 27 - Prob. 7UCh. 27 - Prob. 1ACh. 27 - Prob. 2ACh. 27 - Prob. 3ACh. 27 - Prob. 4ACh. 27 - Prob. 5ACh. 27 - Some bacteria are capable of forming NH4+ from...Ch. 27 - Prob. 7ACh. 27 - Prob. 1SCh. 27 - Prob. 2SCh. 27 - Use of multiple antibiotics is not a bad idea if...Ch. 27 - Soil-based nitrogen-fixing bacteria appear to be...
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- For both fertilizers, plant growth began to decrease when 1.5 kg of fertilizer was given. D) Rhizobia are bacteria that live on the roots of some plants, such as legumes like pea plants. Rhizobia convert an element in the atmosphere into ammonia. Identify and explain the type of relationship this represents. A) It is parasitism because the bacteria absorbs food from the pea plant. It is commensalism because the bacteria and pea plant don't harm each B) other. It is competition because the rhizobia and pea plant both need the limited amount of available nitrogen. C) It is mutualism because the bacteria receives carbon from the pea plant, D) Eliminate while the plant uses the ammopia to make amíno acids. ITEST PREP FAX 1-877-816-0808 Read Our Blog PHONE 1-877-377-9537 Privacy Policy S FOR WHAT'S NEXT © USATestprep, LLC 2021, All Rights Reserved. Sign carrow_forwardDoes the "lag" phase always occur during microbial growth? Explain.arrow_forwardAtmospheric nitrogen can be useda) directly by all living organisms.b) only by aerobic bacteria.c) only by anaerobic bacteria.d) in symbiotic relationships between rhizobia and plants.e) in photosynthesis.arrow_forward
- You're in charge of bioremediation of jet fuel-contaminated soil. Your colleague advises that you add nitrogen and phosphate to the soil to encourage the development of naturally existing hydrocarbon-degrading bacteria. However, you've just read about a new microbe slurry containing nutrients and a surfactant that's being marketed. What information do you need to gather in order to choose the best course of action? How are you going to get these numbers?arrow_forwardWhich of these statements is/are TRUE? A) In general, species that can grow at higher temperatures are prokaryotic. B) The most thermophilic prokaryotes are species of Archaea. C) Chemoorganotrophic organisms are able to grow at higher temperatures than phototrophic organisms. D) All of the statements are true.arrow_forwardDiscuss the possibility of life on Mars. In reference to extremophiles. Defend or refute this statement: The upper-temperature limit to life is unrelated to the stability of proteins or nucleic acids. How influential is microbial activity on the geological processes of mineral formation and deposition compared to biological processes? (argue both sides of this one). What challenges and advantages do you see with the use of extremeophiles in industrial or bioremediation applications?arrow_forward
- Why is most decomposition typically anaerobic in the deep waters of lakes and oceans?arrow_forwardImagine a sewage plant that is releasing sewage containinghigh levels of ammonia and phosphate and very low levels oforganic carbon. Which types of microbial blooms might betriggered by this sewage?arrow_forwardRefer to the following graph of Carbon Assimilation vs. Irradiance of several cultures of dinoflagellates in the northern Baltic Sea. Samples were treated with varying levels of pH. What is the effect of pH on the metabolism of the cultures? a) The growth of the culture is limited by increasing pH. b) The growth of the culture is increased by increasing pH. c) The growth of the culture is not limited by increasing pH. d) The growth of the culture is not affected by increasing pH or increasing irradiation.arrow_forward
- just do d and earrow_forwarda) bacteria are “obligate anaerobes.” What does this mean? On Earth, where might these organisms live? (Give examples.) b) Humans (and most Eukaryotic organisms) are obligate aerobes. What does this mean? On Earth, where might these organisms live? (Give examples.)arrow_forwardWhy are microbial communities important in biodegradation?arrow_forward
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