Textbook Question
Plantlike photosynthesis that releases O2 occurs in
a. Cyanobacteria
b. Archaea
c. Gram-positive bacteria
d. Chemoautotrophic bacteria
Ch. 27 - Bacteria and Archaea
Urry11th EditionCampbell BiologyISBN: 9789357423311
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Table of contents
- Ch. 1 - Evolution, the Themes of Biology, and Scientific Inquiry8
- Ch. 2 - The Chemical Context of Life8
- Ch. 3 - Water and Life6
- Ch. 4 - Carbon and the Molecular Diversity of Life9
- Ch. 5 - The Structure and Function of Large Biological Molecules9
- Ch. 6 - A Tour of the Cell6
- Ch. 7 - Membrane Structure and Function6
- Ch. 8 - An Introduction to Metabolism6
- Ch. 9 - Cellular Respiration and Fermentation10
- Ch. 10 - Photosynthesis7
- Ch. 11 - Cell Communication7
- Ch. 12 - The Cell Cycle10
- Ch. 13 - Meiosis and Sexual Life Cycles10
- Ch. 14 - Mendel and the Gene Idea14
- Ch, 15 - The Chromosomal Basis of Inheritance7
- Ch. 16 - The Molecular Basis of Inheritance9
- Ch. 17 - Gene Expression: From Gene to Protein9
- Ch. 18 - Regulation of Gene Expression10
- Ch. 19 - Viruses6
- Ch. 20 - DNA Tools and Biotechnology8
- Ch. 21 - Genomes and Their Evolution8
- Ch. 22 - Descent with Modification: A Darwininan View of Life6
- Ch. 23 - The Evolution of Populations5
- Ch. 24 - The Origin of Species6
- Ch. 25 - The History of Life on Earth6
- Ch. 26 - Phylogeny and the Tree of Life7
- Ch. 27 - Bacteria and Archaea8
- Ch. 28 - Protists7
- Ch. 29 - Plant Diversity I: How Plants Colonized Land7
- Ch. 30 - Plant Diversity II: The Evolution of Seed Plants7
- Ch. 31 - Fungi5
- Ch. 32 - An Overview of Animal Diversity4
- Ch. 33 - An introduction to Invertebrates6
- Ch. 34 - The Origin and Evolution of Vertebrates7
- Ch. 35 - Vascular Plant Structure, Growth, and Development8
- Ch. 36 - Resource Acquisition and Transport in Vascular Plants8
- Ch. 37 - Soil and Plant Nutrition10
- Ch. 38 - Angiosperm Reproduction and Biotechnology8
- Ch. 39 - Plant Responses to Internal and External Signals8
- Ch. 40 - Basic Principles of Animal Form and Function8
- Ch. 41 - Animal Nutrition7
- Ch. 42 - Circulation and Gas Exchange7
- Ch. 43 - The Immune System6
- Ch. 44 - Osmoregulation and Excretion6
- Ch. 45 - Hormones and the Endocrine System8
- Ch. 46 - Animal Reproduction8
- Ch. 47 - Animal Development8
- Ch. 48 - Neurons, Synapses, and Signaling6
- Ch. 49 - Nervous Systems8
- Ch. 50 - Sensory and Motor Mechanisms5
- Ch. 51 Animal Behavior6
- Ch. 52 - An Introduction to Ecology and the Biosphere7
- Ch. 53 - Population Ecology10
- Ch. 54 - Community Ecology9
- Ch. 55 - Ecosystems and Restoration Ecology8
- Ch. 56 - Conservation Biology and Global Change6
Chapter 27, Problem 5
Bacteria perform the following ecological roles. Which role typically does not involve symbiosis?
a. Skin commensalist
b. Decomposer
c. Gut mutualist
d. Pathogen
Verified step by step guidance1
Understand the concept of symbiosis: Symbiosis refers to a close and long-term biological interaction between two different biological organisms. It can be mutualistic, commensalistic, or parasitic.
Identify the roles listed in the problem: The roles are skin commensalist, decomposer, gut mutualist, and pathogen.
Analyze each role: Determine if each role involves symbiosis. A skin commensalist lives on the skin without harming the host, which is a form of symbiosis. A gut mutualist benefits both the host and the bacteria, which is mutualistic symbiosis. A pathogen harms the host, which is parasitic symbiosis.
Consider the role of decomposers: Decomposers break down dead organic matter, recycling nutrients back into the ecosystem. This process typically occurs independently of a host organism, thus not involving symbiosis.
Conclude which role does not involve symbiosis: Based on the analysis, decomposers typically do not engage in symbiotic relationships as they act independently of living hosts.
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Key Concepts
Here are the essential concepts you must grasp in order to answer the question correctly.
Symbiosis
Symbiosis refers to a close and long-term biological interaction between two different biological organisms. It can be mutualistic, commensalistic, or parasitic, where both, one, or neither organism benefits, respectively. Understanding symbiosis is crucial to differentiate roles that involve direct interactions between organisms.
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02:34
Symbiosis
Decomposer
Decomposers are organisms, such as bacteria and fungi, that break down dead or decaying organisms, recycling nutrients back into the ecosystem. This role typically does not involve symbiosis, as decomposers act independently to process organic matter, unlike symbiotic relationships that require interaction with living hosts.
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02:25Biomagnification and Decomposers
Pathogen
Pathogens are organisms that cause disease in their host, often through parasitic relationships. While pathogens can be considered a form of symbiosis due to their interaction with hosts, they differ from mutualistic or commensalistic relationships as they harm the host, highlighting the diverse nature of symbiotic interactions.
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08:59Pathogen Defenses
Related Practice
Textbook Question
Which of the following involves metabolic cooperation among prokaryotic cells?
a. Binary fission
b. Endospore formation
c. Biofilms
d. Photoautotrophy
Textbook Question
Which of the following statements is true?
a. Archaea and bacteria have identical membrane lipids.
b. The cell walls of archaea lack peptidoglycan.
c. Prokaryotes have low levels of genetic diversity.
d. No archaea are capable of using CO₂ to oxidize H₂, releasing methane.
Textbook Question
Which of the following describes a bacterium that lives in the human intestine and causes disease? (A)commensalist (B)decomposer (C)gut mutualist (D)symbiotic pathogen
Textbook Question
Which of the following statements is not true?
a. Archaea and bacteria have different membrane lipids.
b. The cell walls of archaea lack peptidoglycan.
c. Only bacteria have histones associated with DNA.
d. Only some archaea use CO2 to oxidize H2, releasing methane.