CAMPBELL BIOLOGY 101 PKG - ANNANDALE
14th Edition
ISBN: 9781269935883
Author: Reece
Publisher: PEARSON C
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Textbook Question
Chapter 27.4, Problem 2CC
WHAT IF Ø What would the discovery of a bacterial species that is a methanogen imply about the evolution of the methane-producing pathway?
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Chapter 27 Solutions
CAMPBELL BIOLOGY 101 PKG - ANNANDALE
Ch. 27.1 - Prob. 1CCCh. 27.1 - Contrast the cellular and DNA structures of...Ch. 27.1 - Prob. 3CCCh. 27.2 - Although rare on a per gene basis, new mutations...Ch. 27.2 - Distinguish between the three mechanisms by which...Ch. 27.2 - In a rapidly changing environment, which bacterial...Ch. 27.2 - WHAT IF? If a nonpathogenic bacterium were to...Ch. 27.3 - Distinguish between the four major modes of...Ch. 27.3 - A bacterium requires only the amino acid...Ch. 27.3 - WHAT IF? Describe what you might eat for a...
Ch. 27.4 - Explain how molecular systematics and metagenomics...Ch. 27.4 - WHAT IF What would the discovery of a bacterial...Ch. 27.5 - Explain how prokaryotes, though small, can be...Ch. 27.5 - MAKE CONNECTIONS Review Figure 10.6. Then...Ch. 27.6 - Identify at least two ways that prokaryotes have...Ch. 27.6 - Prob. 2CCCh. 27.6 - Prob. 3CCCh. 27 - Describe features of prokaryotes that enable them...Ch. 27 - Mutations are rare and prokaryotes reproduce...Ch. 27 - Describe the range of prokaryotic metabolic...Ch. 27 - How have molecular data informed prokaryotic...Ch. 27 - In what ways are prokaryotes key to the survivaI...Ch. 27 - Prob. 27.6CRCh. 27 - Genetic variation in bacterial populations cannot...Ch. 27 - Photoautotrophs use (A) light as an energy source...Ch. 27 - Which of the following statements is not true? (A)...Ch. 27 - Prob. 4TYUCh. 27 - Prob. 5TYUCh. 27 - Prob. 6TYUCh. 27 - Prob. 7TYUCh. 27 - SCIENTIFIC INQUIRY INTERPRET THE DATA The...Ch. 27 - WRITE ABOUT A THEME: ENERGY In a short essay...Ch. 27 - SYNTHESIZE YOUR KNOWLEDGE Explain how the small...
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- The unicellular cyanobacterium Prochlorococcus sp. is the most abundant photosynthetic microbe in tropical and subtropical oceans. At least two ecotypes exist: one is adapted to high light and the other to lower light intensities. How does the presence of these two ecotypes contribute to their physiological success and their numerical success? How would you determine the amount of fixed carbon they contribute to these open-ocean ecosystems?arrow_forwardHow did the evolutionary expansion of eukaryotic organisms change the way carbon is cycled through biological communities?arrow_forwardWhich is the autotrophic group responsible for the production of most part of the molecular oxygen of earth?arrow_forward
- Isoprene serves as a building block not only for the hydrocarbons observed in archaeal membranes but also for sterols, carotenoids, retinal, and quinones. Use any resources necessary to identify the function of these other isoprene-based molecules and to determine their distribution in nature. What does the use of isoprene to make this diverse array of molecules suggest about the nature of the last universal common ancestor (LUCA)?arrow_forwardCompare and contrast the physical and chemical conditionson Earth at the time life first arose with conditions today.From a physiological standpoint, discuss at least two reasonswhy animals could not have existed on early Earth. In whatways has microbial metabolism altered Earth’s biosphere?How might life on Earth be different if oxygenicphotosynthesis had not evolved?arrow_forwardEvolution of what biological process is hypothesized to have been made possible by the appearance of chlorophyll in the mesozones of a prokaryote cell? A) self-replicating molecules B) multi-cellularity C) glycolysis D) photosynthesis E) none of these.arrow_forward
- How can the hypothesis that asserts that chloroplasts as well as mitochondria were primitive prokaryotes that associated in mutualism with primitive anaerobic eukaryotic cells be corroborated?arrow_forwardWhich of the following statements is correct for bothblue-green algae and bacteria ?(a) Both show anaerobic respiration.(b) Both have chlorophyll pigment.(c) Both are devoid of true nucleus.(d) None of the above Please try to break the solutions into as many steps as practically possible and the steps should come one by one and they should be short and crisp and plagiarism-free.arrow_forwardWhy are the two great oxygenation events in the earth’s atmosphere seen as key prerequisites for the development of Eukaryotic life and later Multicellular life?arrow_forward
- How could the biological carbon cycle have worked on the primitive Earth, where oxygen gas was essentially absent from the atmosphere and oceans?arrow_forwardPlace the five metabolic types in the probable order of their evolution: oxygenic photosynthesis, aerobic metabolisms, anaerobic chemolithoautotrophy, anaerobic chemorganoheterotrophy, anoxygenic photosynthesis. You are expected to justify your answers by identifying the origins of the energy, the carbon used and the redox couples (electron donors and acceptors). Describe the environmental conditions that probably led to the evolution of the next metabolism.arrow_forwardHow does the iron–sulfur world hypothesis differ from the prebiotic soup hypothesis? What do these hypotheses have in common?arrow_forward
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