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ch09 - Chapter 9 Biodiversity How Diverse is Life 1 In the...

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Chapter 9 Biodiversity: How Diverse is Life? 1. In the last 250 years Biologists have catalogued about 1.5 million different kinds of organisms. Yet new species are still being discovered in: a. the tops of trees that are hundreds of feet high b. deep oceans once thought to be wastelands c. crawl spaces between soil particles d. thousands of feet deep in rock cracks e. all of the above Ans: e 2. The difference between taxonomy and systematics is that: a. systematics is the science of classifying organisms according to their similarities and differences while taxonomy is the study of evolutionary relationship among organisms b. systematics is the logical and orderly placement of organisms into categories alphabetically while taxonomy is the random placement of organisms into categories. c. taxonomy is the science of classifying organisms according to their similarities and differences while systematics is the study of evolutionary relationships among organisms. d. taxonomy is the science of classifying organisms according to date of discovery while systematics is the study of function of parts of organisms. e. there is no difference between taxonomy and systematics Ans: c 3. Early biologists imagined that life could have originated in all of the following places EXCEPT: 4. What evidence did Urey and Miller present to demonstrate that the early atmosphere could have given rise to organic matter? 115
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Chapter 9 a. They formed amino acids by applying electric sparks to a simulated atmosphere of methane, ammonia, hydrogen sulfide and water vapor b. They used spontaneous generation to form cells by combining phospholipids with proteins c. They left rotten fish exposed to the atmosphere to create microbes d. They used flint and steel to spark carbon dioxide into combustion to form carbon compounds e. They stimulated chemical reaction with enzymes to form nucleic acids Ans: a 5. Which substances below might have attracted and concentrated amino acids leading to the formation of proteins? 6. Put these key events in the chemical evolution of life in the correct order: I. Living Cells II. Evolution of DNA -> RNA -> Enzymes III. Protocells IV. Spontaneous generation of amino acids V. Formation of proteins a. I, II, II, IV, V b. IV, V, II, III, I c. V, IV, II, III, I d. IV, V, III, II, I e. V, IV, III, II, I Ans: b
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