Campbell Biology 11th Edition - Valuepack
11th Edition
ISBN: 9780134833545
Author: Michael L. Cain, Steven A. Wasserman, Peter V. Minorsky, Jane B. Reece Neil A. Campbell Lisa A. Urry
Publisher: PEARSON
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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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Why might chemosynthetic communities exist only in places like the deep-ocean floor rather than across a wide range of land and sea habitats, the way photosynthesis-based communities are?
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algae
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cyanobacteria
O strict/obligate aerobic bacteria
Although chemoautotrophs serve as the primary producers near hydrothermal vents, animals there still ultimately depend on the photosynthetic activities of plants and cyanobacteria. Why?
Chapter 27 Solutions
Campbell Biology 11th Edition - Valuepack
Ch. 27.1 - Describe two adaptations that enable prokaryotes...Ch. 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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- What is the origin of oxygen on earth? What would happen to earth’s supply of oxygen if photosynthesis suddenly were to cease?arrow_forwardHow would the nitrogen cycle operate in the absence of bacteria and archaeons?arrow_forwardWhy might H2 metabolism have evolved as amechanism for energy conservation in the earliestorganisms on Earth?arrow_forward
- Chloroplasts most likely originated from which of these independent organisms? a) Cyanobacteria b) Purple sulfur bacteria c) Gamma-proteobacteria d) Anoxygenic phototrophsarrow_forwardConsidering the negative aspects of anaerobic respiration, how could natural selection have produced something so inefficient?arrow_forwardWhich is the autotrophic group responsible for the production of most part of the molecular oxygen of earth?arrow_forward
- Chemolithrophs near hydrothermal vents support a variety of other life forms there. Explain now their role is analogous to that of photosynthetic organisms in the terrestrial environment.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_forwardWhat is the endosymbiotic hypothesis for the originof mitochondria and chloroplasts? What evidencesupports this hypothesis?arrow_forwardThe common name for species like Anabena is blue-green algae. This group of bacteria are capable of photosynthesizing. Do they contain chloroplasts? Explain.arrow_forward
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Metabolic Diversity (photo-/chemo-, auto-/hetero-, litho-/organo-trophy) | GEO GIRL; Author: GEO GIRL;https://www.youtube.com/watch?v=vyLAm1CYIsI;License: Standard YouTube License, CC-BY