26 maybe - Chapter 26 Early Earth and the Origin of Life 1)...

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Chapter 26 Early Earth and the Origin of Life 1) What is the evidence that protobionts may have formed spontaneously? A) the discovery of ribozymes, showing that prebiotic RNA molecules may have been autocatalytic B) the laboratory synthesis of microspheres, liposomes, and coacervates C) the fossil record found in the stromatolites D) the abiotic synthesis of polymers E) the production of organic compounds within a laboratory apparatus simulating conditions on early Earth 2) In what way is the complex process of photosynthesis similar to some of the simple reactions that are thought to have led to the origin of life on Earth? A) Both involve an electron transport chain. B) In both, simple molecules are reduced to form complex organic molecules. C) Both require light energy in order to proceed. D) Oxygen is a by-product of both types of reactions. E) Both must occur within membrane-enclosed structures. 3) In which of the following ways are ALL living things alike? A) They are all composed of cells with nuclei. B) They all breathe. C) They all contain complex, reduced molecules. D) They all have circulatory systems. E) They all undergo mitosis. 4) In classifying organisms, scientists try to select groups of organisms with common characteristics due to common ancestry. Of the kingdoms listed below, which one includes organisms with the greatest variety of life styles, structures, and functions? In other words, organisms in which kingdom are LEAST likely to have common ancestry? A) Monera B) Protista C) Fungi D) Plantae E) Animalia 5) Current theories of prebiotic evolution are based on evidence for all of the following EXCEPT A) abiotic production of small organic molecules. B) abiotic polymerization of amino acids.
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C) abiotic replication of oligopeptides. D) abiotic origin of DNA-protein interactions. E) abiotic production of proteinoid microspheres. 6) The first genetic material was most likely A) a DNA polymer. B) a DNA oligonucleotide. C) an RNA polymer. D) a protein. E) a protein enzyme. Use the following information to answer the questions below. According to the Miller-Urey experimental results, chemical evolution leading up to and including the formation of living matter is believed to have occurred during the early history of Earth. Below are five pairs of events that might have occurred during this period. Judge the relative time of each of these pairs of events according to the key below. A. Event I occurred before Event II. B. Event II occurred before Event I. C. Events I and II occurred simultaneously. 7) Event I Event II nitrogen oxides and carbon dioxide free oxygen in the atmosphere in the atmosphere 8) Event I Event II formation of photosynthetic organisms formation of heterotrophic organisms 9) Event I Event II formation of amino acids formation of enzymes 10) Event I Event II atmosphere of water, methane, reducing atmosphere and ammonia
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11) Approximately how far does the fossil record extend back in time? A) 6,000 years B) 3,500,000 years C) 6,000,000 years D) 3,500,000,000 years E) 5,000,000,000,000 years
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26 maybe - Chapter 26 Early Earth and the Origin of Life 1)...

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