Microbiology: An Evolving Science (Fourth Edition)
4th Edition
ISBN: 9780393615098
Author: John W. Foster, Joan L. Slonczewski
Publisher: W. W. Norton & Company
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Chapter 1.5, Problem 1TQ
Summary Introduction
To review:
The classification of Archaea as a third domain of life and the arguments supporting the classification of Archaea and bacteria together as prokaryotes.
Introduction:
Three domain systems of biological classification was developed by Carl Woese. According to this system, organisms are classified into Archaea, bacteria, and eukarya. It specifically stresses the division of prokaryotes into two classes that were initially called eubacteria (bacteria) and archaebacteria (Archaea).
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Why is there a debate as to whether archaea is classified as prokaryotic or eukaryotic
Which of the following statements is correct for archaea?(a) Archaea resemble eukaryotes in all respects.(b) Archaea have some novel features that are absent inother prokaryotes and eukaryotes.(c) Archaea completely differ from both prokaryotes andeukaryotes.(d) Archaea completely differ from prokaryotes
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.
Some prokaryotes, especially archaea, are capable of living in extreme environments, such as deep-sea vents, where temperatures can reach 80°C (176°F). Few organisms can survive at this temperature. What adaptations might archaea possess that allow them to survive in such extreme heat?
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Microbiology: An Evolving Science (Fourth Edition)
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- All of the following statements are true about the3-domain classification system EXCEPT:(a) The three domains are Bacteria, Archaea, and Eukarya.(b) Lateral gene transfer has forced us to rethink our do-main model from a “tree of life” to a “shrub of life.”(c) Domains are higher than the category of kingdoms.(d) Compared to Bacteria, Archaea inhabit the same en-virons and have the same amount of peptidoglycan intheir cell walls.(e) All of the above are true.arrow_forwardHow do bacteria and archaea differ from each other? Contrast prokaryotic cells with eukaryotic cells.arrow_forwardIn the domain system of classification, prokaryotes are divided into two domains: Bacteria and Archaea. The two domains differ in all BUT one feature. Which feature do they have in common? Question options: They both have identical cell walls. They both have prokaryotic cells. They both thrive in extreme environments. They both are able to live only under anaerobic conditions.arrow_forward
- What features are similar between Archaea and Eukarya?arrow_forwardThere are three main ways that bacteria and archaea are essential to eukaryotic life. Explain the three different ways and give at least one example of each.arrow_forwardWhat features are similar between Bacteria and Eukarya?arrow_forward
- Despite many interesting characteristics and features observed in Archaea, why is there not much study about these organisms?arrow_forwardSelect the choice that identifies the organism described in the following statement: The organism is heterotrophic, has cells with cell walls, and is a eukaryote. Question 24 options: a) Archaea b) Fungi c) The protist called an amoeba d) Plantaearrow_forward19) Which of the trees in this figure groups the domains according to similarities in cellular size and architecture? A) A B) B C) C D) D Bacteria Eukarya Archaea Bacteria Archaea Eukarya Bacteria Eukarya Archaea Eukarya Archaea Bacteriaarrow_forward
- Why did Carl Woese propose the domain Archaea? The domain Bacteria already had too many organisms in its classification. The methanogens were discovered to be a complex organism, between prokaryotic bacteria and eukaryotes, thus it needed its own domain. He discovered that methanogens were too large to be classified as bacteria, but too small to be classified as Eukarya. In analyzing the rRNA of methanogens, he discovered that it was completely distinct from any other bacterial RRNA that had been studied. The DNA of methanogens was discovered to use different nucleotides than those of organisms in Eukarya or Bacteria.arrow_forwardHow many species of Bacteria and Archaea have been named?How many likely exist?arrow_forwardWhich of the following is true regarding the diversity of life ? a) Domain Archaea does not contain any disease-causing organisms. b) Bacteria can vary greatly in size and range up to 700 µm in length Microbial Eukarya may have first arisen two billion years ago, well before fungi, plants c) animal d) All of the above are true 7:33 /arrow_forward
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