BIO 1406/07 W/CONNECT/LM NEW >IC<
16th Edition
ISBN: 9781260075762
Author: Raven
Publisher: MCG CUSTOM
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Textbook Question
Chapter 28, 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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Chapter 28 Solutions
BIO 1406/07 W/CONNECT/LM NEW >IC<
Ch. 28 - Prob. 1UCh. 28 - A cell that can use energy from the sun, and CO2...Ch. 28 - Gram-positive (+) and gram-negative () bacteria...Ch. 28 - Which of the following characteristics is unique...Ch. 28 - The horizontal transfer of DNA using a plasmid is...Ch. 28 - The disease tuberculosis is a. caused by a...Ch. 28 - Prokaryotes participate in the global cycling of...Ch. 28 - Which of the following is typically NOT associated...Ch. 28 - The mechanisms of DNA exchange in prokaryotes...Ch. 28 - The cell wall in both gram-positive and...
Ch. 28 - The three domains of life a. represent variations...Ch. 28 - Ulcers and tooth decay do not appear related, but...Ch. 28 - Bacteria lack independent internal membrane...Ch. 28 - Plants cannot fix nitrogen, yet some plants do NOT...Ch. 28 - If a new form of carbon fixation was discovered...Ch. 28 - Prob. 2SCh. 28 - Use of multiple antibiotics is not a bad idea if...Ch. 28 - Soil-based nitrogen-fixing bacteria appear to be...
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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.arrow_forwardWhile leafy greens are nutritionally rich, raw greens are also a significant source of foodborne illnesses. From 2014 to 2018, there were 51 foodborne disease outbreaks reported to the CDC linked to leafy greens, but the actual number of illnesses is likely much higher because more foodborne illnesses are not part of a recognized outbreak. Imagine you are a researcher interested in studying the microbial community on leafy greens from many different commercial sources. →You notice that many of the species identified are capable of forming biofilms. You hypothesize that biofilm formation is also important for causing foodborne illnesses. What features of biofilms would make them important in causing foodborne illness from leafy greens? What structural component(s) of the E. coli cell might play a role in initial biofilm formation on leafy greens?arrow_forwardRegarding nitrogen fixation, are the following statements True or False? a) Atmospheric nitrogen is reduced to the biologically useful form NH3 (or NH4 ). b) Nitrogen fixation in nature and in the lab requires a metal cofactor or catalyst. c) The availability of fixed nitrogen limits biological productivity. d) Ammonium from the atmosphere is fixed to more usable forms of nitrogen, such as nitrite (NO2–). e) Nitrogen fixation is energetically neutral, using a negligible amount of ATP. f) The enzyme nitrogenase, which takes part in nitrogen fixation, is inactivated by oxygen.arrow_forward
- Soil microorganisms, collectively referred to as dizotrophs, fix 90% of the inert nitrogen gas to ammonium and nitrate. There are two-main types of nitrogen-fixing bacteria: free-living (nonsymbiotic) and mutualistic (symbiotic). Describe the mutualistic relationship between Rhizobium and legumes. What is the advantage of using legumes as a cover crop in agricultural systems? A point of interest is that the nitrogenase enzyme complex is highly sensitive to oxygen. This is a major problem for free-living aerobic species such as cyanobacteria and species of the genera Azotobacter and Beiigrinckia. Describe two ways the bacteria can overcome to levels of oxygen in their cells.arrow_forwardFor 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_forwardWhy is the ozone layer vital to life on earth?arrow_forward
- Atmospheric 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_forwardThe process by which microbes break down food and paper waste into nutrient-rich humus is called: Question 2 options: A) eutrophication B) sludging C) oxygen recycling D) compostingarrow_forwardDoes the "lag" phase always occur during microbial growth? Explain.arrow_forward
- In which year montreal protocol which calls for appropriate action to protect the ozone layer from human activities was passed?arrow_forwardBased on what you know about ozone thinning, which location would be the most concerning in terms of exposure to UV radiation, assuming you were planning to travel there? Greenland O Japan India New Zealand O The United Statesarrow_forwardYou'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_forward
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