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 17.2, Problem 2TQ
Summary Introduction
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The relation between the finding of life on Mars and the origin and evolution of life on Earth.
Introduction:
The life on Earth originated 3.5 billion years ago. It is hypothesized that the early forms of life that inhabited the Earth were thermophiles. The earliest form of organisms that diverged in the domain bacteria and archaea belong to the thermophilic group. Various theories have been postulated to provide the explanation for the origin of life on Earth.
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Direct evidence of life on early Earth comes from fossils of microorganisms that lived 3.5 billion years ago. But how did the first living cells appear?
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Microbiology: An Evolving Science (Fourth Edition)
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- What evidence would you look for on Enceladus, Europa or Mars that would tell you that life may have existed there in the past?arrow_forwardgive a description of the theory proposed by oparin, miller, sagan, fox and others for the orgin of life from non-living material. What do you think about the origin of life? -philosophy of sciencearrow_forwardShow the evolution of living organisms from elements to present-day organisms.arrow_forward
- “What is the origin of life or the main ancestor of all organisms?”, what would be your answer and why?arrow_forwardIf living cells were produced in a test tube from nonbiological components by chemical processes, would this accomplishment prove that life evolved in asimilar manner billions of years ago? Explain your answer.arrow_forwardPresent three possible explanations for the origin of life.arrow_forward
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- What is the most logical theory on the topic of the Origin of Life?arrow_forwardWhich molecule is believed to have preceded the other two during the evolution of life? RNA Proteins DNAarrow_forwardWhich molecule -DNA or RNA- do scientist believe was found in the first life form on Earth? Why do scientist believe this molecule was first to form life?arrow_forward
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