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
To review:
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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Chapter 17 Solutions
Microbiology: An Evolving Science (Fourth Edition)
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- give 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_forwardDescribe the birth of life on earth.arrow_forwardThe Miller experiment consisted of various gases, believed to have been present in the early atmosphere of Earth, exposed to an electrical arc. This experiment resulted in a. nothing. b. carbon dioxide gas and water vapor. c. amino acids. d. rain.arrow_forward
- Which molecule is believed to have preceded the other two during the evolution of life? RNA Proteins DNAarrow_forwardThe first forms of life on Earth were thought to be_________. a. single-celled plants b. prokaryotes c. insects d. large animals such as dinosaursarrow_forwardA. What do scientists think the primitive Earth was like? Give 3 evidences. B. How could life possibly evolve in such an inhospitable environment?arrow_forward
- Based on the Origin of Life by John H. McClendon, how did life on earth start based on the different theories?arrow_forwardWhich of the following steps has not yet been accomplished byscientists studying the origin of life?(A) synthesis of small RNA polymers by ribozymes(B) formation of molecular aggregates with selectivelypermeable membranes(C) formation of protocells that use DNA to direct thepolymerization of amino acids(D) abiotic synthesis of organic moleculesarrow_forwardWhich of these steps probably occurred first in the chemical andbiological evolution of life?a. The cell membrane of a protobiont formed.b. The first organic molecules formed.c. The original genetic material was RNA.d. Simple organic monomers formed from inorganic materials.arrow_forward
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