Chapter 10 - PrepU flashcards _ Quizlet

Chapter 10 - PrepU flashcards _ Quizlet - Chapter 10 PrepU...

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Chapter 10 ‐ PrepU Created by gaboplus 96 terms The graph above shows rates of extinction for two categories of extinction (mass and background). Several factors influence whether a family or a species becomes extinct­­these include competition and changing environmental conditions. Which graphical feature of the data on background extinctions is related to this issue? a) only data from the last 500 million years are shown b) rates of mass extinctions are shown to higher than background extinctions c) data is for families and not species d) the green line never gets higher than around 15% e) the green line indicating rate of background extinctions is not straight the green line indicating rate of background extinctions is not straight What scientist(s) first demonstrated in the laboratory that organic compounds could be synthesized in an abiotic environment? a) Rosalind Franklin b) Haldane and Oparin c) Urey and Miller d) Watson and Crick e) Anton Van Lueenhoech Urey and Miller Archaeans can be found in which of the following environments? a) hot springs b) very salty ponds c) on the bottom of the ocean d) All of the above are environments where archaeans live. e) Only b) and c) are true. All of the above are environments where archaeans live.
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The RNA world hypothesis proposes that the world may have been filled with RNA­ based life before it was filled with DNA­ based life. This hypothesis is based on which of the following observations? a) RNA enzymes can link together nucleotides. b) RNA is abundant in living organisms. c) RNA has the ability to catalyze chemical reactions like proteins. d) RNA can store information like DNA. e) All of these observations support the RNA world hypothesis. All of these observations support the RNA world hypothesis. In a set of classic experiments performed in the early 1950s, Urey and Miller subjected an experimental system composed of H2, CH4 (methane), and NH4 (ammonia) to electrical sparks. A few days later, they found ________________ in their system. a) microspheres b) cells c) amino acids d) RNA e) DNA amino acids Much of what is known about the history of the origin of life came from: a) written history. b) educated guesses. c) the study of climatic change. d) the study of fossils. e) None of the above; nothing is known about the history of the origin of life. the study of fossils. The green arrow in the diagram above represents: a) number of evolved characteristics. b) direction of stabilizing evolution. c) number of common ancestors. d) evolutionary advancement. e) time. time.
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The Biological Species Concept: a) is the best and most accurate species concept. b) states that species that live together will eventually start breeding. c) states that a species is any group which shares similar DNA. d) states that any organisms that are biologically similar constitute a species.
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Chapter 10 - PrepU flashcards _ Quizlet - Chapter 10 PrepU...

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