Exam 1 08 final w-answers

Exam 1 08 final w-answers - Biology 187 Spring 2008 First...

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Biology 187 Spring 2008 First Exam With answers The absolute score for the class was a little over 38 correct answers out of 51. I am adding 1 more “correct” answer to your raw score. [See question 25]. Thus the overall average for this first exam was 39 x 2 = 78% or a high C. In comparison with classes in the past, 78% is considerably higher than usual. Good work. 1-5. Match these sentences or phrases with the best term on the right. Use each term only once. 1. What you ought to see. c. Prediction 2. A rejected explanation e. Conclusion 3. A table of numerical results d. Test 4. A tentative explanation b. Hypothesis 5. How did that happen? a. Causal question 6. It is NOT true that “a scientific hypothesis is an educated guess about the outcome of a scientific experiment.” Why is that definition wrong? a. Science involves more than experiments; collecting observational data is also important. b. Scientific hypotheses are more than just guesses; they are based on solid scientific theories. c. Making an educated guess about the outcome of an experiment is part of the process of testing a hypothesis but not the hypothesis itself. [ The key is that a hypothesis is an explanation; making a “guess” about the outcome of an experiment is a prediction, not an explanation/] d. Scientists simply do not guess but instead always require evidence before doing any research. 7. Why can we say that statements about the validity of hypotheses are the main products of scientific research? a. Because the major motivation for most scientists is the desire to know whether an explanation for a natural phenomenon is accurate. [This is the point of science and the reason why scientific conclusions are the basis for medicine, agriculture and technology.] b. Because scientists want to demonstrate that religious faith has no place in scientific investigation. c. Because scientists want to publish research papers and therefore they need to produce accurate data. d. Because a hypothesis requires proof before it can be accepted as a scientific law. 8-11. We put up a hummingbird feeder to which Anna’s hummingbirds will eventually come. We have a number of questions. Which of these is a (A) descriptive and which is (B) causal? 1
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8. How do Anna’s hummingbirds locate new feeders quickly? [Causal; what causes the birds to find the new source of food?] 9. How frequently do the hummingbirds interact with others at a new feeder? [Descriptive; asks only for a number] 10. Why do the hummingbirds interact so aggressively with others of their species? [Causal; what causes hummingbirds to be such fighters; what do they get out of it?] 11. How much sugar water can a hummingbird consume in one day? [Descriptive; asks only for a number] 12-15. Here is a tree of life diagram. 12. If we agree that this diagram constitutes a hypothesis, what was most likely to have
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This note was uploaded on 04/02/2008 for the course BIO 187 taught by Professor Douglasgreen during the Spring '07 term at ASU.

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Exam 1 08 final w-answers - Biology 187 Spring 2008 First...

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