Midterm 1 - Midterm 1-v1 postmortem User ID: bthames3...

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Midterm 1-v1 postmortem User ID: bthames3 Attempt: 1 / 5 Out of: 104 Started: December 11, 2006 19:28 Finished: December 11, 2006 19:42 Time spent: 14 min. 47 sec. Student finished 35 min. 13 sec. ahead of the 50 min. time limit. Question 1 (2 points) 1. The appearance of multicellular organisms coincided with increased levels of _______ in Earth's atmosphere. Student response: Student Response Answer Choices a. helium b. hydrogen c. nitrogen d. all of the above e. none of the above Score: 2 / 2 Question 2 (2 points) 2. The possible collision of a large meteorite with Earth 65 million years ago may explain Student response: Student Response Answer Choices a. the breakup of Gondwana. b . the onset of the last major glaciation. c. the mass extinction that occurred at the end of the Cretaceous period. d . the evolutionary radiation at the beginning of the Cambrian. e. None of the above Score: 2 / 2 Question 3 (2 points) 3. One of the major findings of the Challenger expedition was that Urschleim ("primordial ooze"):
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Student response: Student Response Answer Choices a. occurs only in the deepest parts of the Pacific Ocean. b . is an inorganic precipitate formed during preservation of sediment samples. c. consumes organic carbon and is therefore heterotrophic. d . is generated by microbial aggregates similar to stromatolites. e. None of the above. Score: 2 / 2 Question 4 (2 points) 4. During a study session about evolution, one of your fellow students remarks, "The giraffe stretched its neck while reaching for higher leaves; its offspring inherited longer necks as a result." Which statement would you use to correct this student's misconception? Student response: Student Response Answer Choices a. Characteristics acquired during an organism's life are generally not passed on through genes. b . Spontaneous mutations can result in the appearance of new traits. c. Disuse of an organ may lead to its eventual disappearance. d . Overproduction of offspring leads to a struggle for survival. e. Only favorable adaptations have survival value. Score: 2 / 2 Question 5 (2 points) 5. Which of the following is (are) true of natural selection?
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Student response: Student Response Answer Choices a. results in descent with modification b. requires genetic variation c. involves differential reproductive success d. B and C only e. A, B, and C Score: 2 / 2 Question 6 (2 points) 6. Radioisotopes are often used to determine the time of death of fossilized remains. Tritium has a half-life of 12.3 years. That means that 37 years after an organism dies it will contain about _______ of the original radioactive tritium. Student response: Student Response Answer Choices a. all b. 1/2 c. none d. 1/4 e. 1_8 Score: 2 / 2 Question 7 (2 points) 7. Over much of its history, the climate of Earth was Student response: Student Response Answer Choices a. about the same as it is today. b
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This note was uploaded on 04/29/2008 for the course BIO 1510 taught by Professor Unknown during the Fall '07 term at Georgia Institute of Technology.

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Midterm 1 - Midterm 1-v1 postmortem User ID: bthames3...

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