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Week 1 Quiz KE - Week 1 Quiz 1 How does a scientific theory differ from a scientific hypothesis A There is no difference-the terms are

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Week 1 Quiz 1. How does a scientific theory differ from a scientific hypothesis? A. There is no difference—the terms are interchangeable. B. A theory is an explanation for a very general phenomenon or observation; hypotheses treat more specific observations. C. A hypothesis is an explanation for a very general phenomenon; theories treat more specific issues. D. Theories define scientific laws; hypotheses are used to set up experiments. Answer : B 2. Recall Pasteur’s experiment on spontaneous generation. The experiment described in Fig 1.2 is a second- generation experiment. Originally Pasteur had used sealed and unsealed flasks instead of sealed and swan- necked flasks. Critics claimed that the initial experiment was inconclusive. Which of the following criticisms would be addressed by using a swan-necked flask instead of the unsealed flask? A. The broth was heated too intensively. B. There had not been enough time for spontaneous generation to occur. C. Fresh air is required for spontaneous generation. D. The broth was not nutritious enough. Answer : C (The pool of water that forms in the U of the neck of the flask doesn’t block it completely—air can still diffuse in.) 3. How does artificial selection differ from natural selection? A. Artificial selection occurs only in computer simulations, not with actual organisms. B. Artificial selection is based on conscious choices by humans. C. Artificial selection occurs only with plants. D. Artificial selection is not based on heritable variation, but on new mutations. Answer : B 4. Environments all over the world are changing as a result of global warming. Will this cause natural selection to occur? A. No. The environment is always changing. Global warming is nothing new. B. Yes. Traits that help individuals produce more offspring in warmer environments will increase in frequency. C. No. The only change will be that species from hot environments will expand their ranges. D. Yes. Mutations occur more frequently in hot environments.
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This note was uploaded on 04/08/2008 for the course BIO 251 taught by Professor Pough during the Fall '06 term at RIT.

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Week 1 Quiz KE - Week 1 Quiz 1 How does a scientific theory differ from a scientific hypothesis A There is no difference-the terms are

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