Microbiology: A Systems Approach
5th Edition
ISBN: 9781259706615
Author: Marjorie Kelly Cowan Professor
Publisher: McGraw-Hill Education
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Chapter 1, Problem 1VC
Summary Introduction
To indicate:
The viruses on the given graph describing origin of life and evolution to higher organisms.
Concept introduction:
The evolution of the life describes the events, from which the diversified organisms have evolved from a single-celled organism. The earth has formed around 4,570 million years ago and over the passage of time, the organisms are evolving.
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Students have asked these similar questions
Which came first virus or man? Why viruses infect humans the way they do?
Some people feel that viruses are living organisms. Give an explanation as to why they cannot be considered living at this time.
Which of the following statements correctly describes viruses?
Select one:
A. They can reproduce by dividing.
B. They cannot reproduce without a host cell.
C. They have a genome similar to prokaryotic and eukaryotic cells.
D. They can carry out their own metabolic activities.
Chapter 1 Solutions
Microbiology: A Systems Approach
Ch. 1.1 - List the various types of microorganisms.Ch. 1.1 - Identify multiple professions using microbiology.Ch. 1.2 - Describe the role and impact of microbes on the...Ch. 1.2 - Explain the theory of evolution and why it is...Ch. 1.3 - Explain one old way and one new way that humans...Ch. 1.4 - Summarize the relative burden of human disease...Ch. 1.5 - Differentiate among bacteria, archaea, and...Ch. 1.5 - Identify a fourth type of microorganism.Ch. 1.5 - Compare and contrast the relative sizes of the...Ch. 1.6 - Make a time line of the development of...
Ch. 1.6 - List some recent microbiological discoveries of...Ch. 1.6 - Explain what is important about the scientific...Ch. 1.7 - Differentiate among the terms nomenclature,...Ch. 1.7 - Create a mnemonic device for remembering the...Ch. 1.7 - Correctly write the binomial name for a...Ch. 1.7 - Draw a diagram of the three major domains.Ch. 1.7 - Explain the difference between traditional and...Ch. 1 - Which of the following is not considered a...Ch. 1 - Which process involves the deliberate alteration...Ch. 1 - Prob. 3MCQCh. 1 - Prob. 4MCQCh. 1 - Prob. 5MCQCh. 1 - Prob. 6MCQCh. 1 - Which is the correct order of the taxonomic...Ch. 1 - Prob. 8MCQCh. 1 - Order the following items by size, using numbers:...Ch. 1 - How would you classify a virus? a. prokaryotic b....Ch. 1 - Organisms in the same order are more closely...Ch. 1 - Prob. 12TFCh. 1 - Prob. 13TFCh. 1 - Prob. 14TFCh. 1 - Prob. 15TFCh. 1 - Prob. 1CTQCh. 1 - Define the term ubiquitous, and provide examples...Ch. 1 - Differentiate the terms emerging disease and...Ch. 1 - Discuss how the findings of Louis Pasteur may have...Ch. 1 - You are a scientist researching West Nile virus, a...Ch. 1 - Prob. 1VCCh. 1 - Prob. 1CM
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- Figure 17.6 Influenza virus is packaged in a viral envelope, which fuses with the plasma membrane. This way, the virus can exit the host cell without killing it. What advantage does the virus gain by keeping the host cell alive?arrow_forwardHIV is a retrovirus what does this mean? A. That is a DNA virus and it must make RNA before it can make proteins. B. That it is an RNA virus and must convert its genetic material to DNA once it enters a cell. C. That is was a virus discovered in the recent past D. That is an RNA virus and goes directly to ribosomes of host cells to reproduce Please explain your answer!arrow_forwardFigure 17.6 Influenza virus is packaged in a viral envelope, which fuses with the plasma membrane. This way, the virus can exit the host cell without killing it. What advantage does the virus gain by keeping the host cell alive?arrow_forward
- Why don’t scientists usually consider viruses living? A.They do not have DNA B.They do not have cells C.They cannot reproducearrow_forwardWhy are viruses NOT considered living organisms? They are not composed of cells They cannot reproduce on their own They have no nucleus all of the abovearrow_forwardViruses consist of either DNA or RNA wrapped inside a protein coat. Are viruses considered alive? A. Yes, because they contain DNA. B. Yes, because they contain DNA and proteins. C. No, because they lack carbohydrates and lipids. D. No, because some viruses use RNA as the main genetic molecule.arrow_forward
- Students are debating about differences between viruses and cells. Which student’s argument is MOST correct using evidence from the diagrams? A. Diagram 1 represents a virus and Diagram 2 represents a cell because viruses do not have nucleic acids but cells do. B. Diagram 1 represents a cell and Diagram 2 represents a virus because a virus has nucleic acids and cells do not. C. Diagram 1 represents a cell and Diagram 2 represents a virus because viruses have a protein capsid while cells have a lipid membrane. D. Diagram 1 represents a virus and Diagram 2 represents a cell because cells have ribosomes to make their own proteins and viruses do not.arrow_forwardWhich of the following is a reason that scientists do not classify viruses as living things? A. They must infect a host because they cannot reproduce on their own. B. They contain DNA, like all living organisms. C. The experience evolution through natural selection. D. They replicate themselves and reproducearrow_forwardWhat is the difference between bacteria and viruses? Bacteria are non-living pieces of DNA or RNA; viruses are single-celled organisms Viruses are killed by antibiotics; bacteria are killed by probiotics Bacteria are harmful and are the cause of major human diseases; viruses are often helpful and can kill harmful bacteria Bacteria are single-celled organisms capable of survival and reproduction on their own; viruses cannot survive and replicate without a host cellarrow_forward
- What are two things that are true about all known viruses? Hint: one relates to the virus itself, the other relates to the ability of the virus to reproduce (replicate).arrow_forwardWhich of the following statements is not true? Select one: a. Viruses multiply inside living cells using viral - mRNA, tRNA & ribosomes. b. Viruses multiply inside living cells. c. Viruses contain DNA or RNA. d. The nucleic acid of a virus is surrounded by a protein coat. e. Viruses cause the synthesis of specialized infectious elements.arrow_forwardThere is a big debate if viruses are alive or not. Either way, look at the list below and pick out the accurate statements. A. Can only reproduce/replicate in a living cell. B. They have a protein coat surrounding and protecting the nucleic acid. C. Viruses have either DNA OR RNA - not both D. They sometimes have an envelope.arrow_forward
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