Final_4pm - Midterm #1 4pm 1. The most recent estimates...

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Midterm #1 4pm 1. The most recent estimates suggest that life originated _______ years ago, during the _________ era. a. 4.6 billion, Precambrian b. 440 million, Paleozoic c. 70 million, Mesozoic d. 3.6 billion, Precambrian e. 1 billion, Paleozoic 2. Which of the following views was held by Lamarck but not Darwin? a. Each species represents a stage in its evolution from a simple ancestor to a more complicated and perfect form b. Each new species arose through spontaneous generation and had its own evolutionary trajectory c. Characteristics acquired during an organism’s lifetime will be passed on to its offspring. d. Two of the above e. Three of the above 3. Which of the following statements is FALSE about the early earth and the origin of life? a. The early earth was a reducing (electron adding) environment that promoted the formation of chemical bonds b. The ions in clay may have attracted charged organic molecules, bringing them together so that they were able to polymerize c. Oxygen was present in the atmosphere before the origin of the first multicellular organisms d. The origin of life is thought to have occurred after the earth began to cool e. Liposomes may have been the first cells because they can catalyze some biochemical reactions, and replicate themselves in the presence of ions like iron and zinc 4. The following quote is likely the words of which scientist? “Snakes have adopted the habit of crawling on the ground and hiding in the grass; so that their body, as a result of continually repeated efforts at elongation for the purpose of passing through narrow spaces, has acquired a considerable length, quite out of proportion to its size. Now, legs would have been quite useless to these animals and consequently unused. The disuse of these parts thus became permanent in the various races of these animals, and resulted in the complete disappearance of these same parts, although legs really belong to the plan or organization of the animals of this class.” a. James Ussher b. Jean-Baptise Lamarck c. Erasmus Darwin d. Charles Darwin e. Kettlewell
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5. What are the four postulates of evolution by natural selection? a. Populations vary; The variation is heritable; More offspring are produced than can survive; Populations differ in their production of offspring b. Individuals in a population vary; The variation is heritable; More offspring are produced than can survive; Individuals differ in their production of offspring c. Individuals in a population vary; The variation is heritable; More offspring are produced than can survive; Individuals have different alleles d. Individuals in a population vary; The variation is heritable; All offspring survive; Individuals produce offspring Percent Recaptured Woodland Melanics Pepper Urban (black trees) 27.5 13.0 Rural (lichen covered trees) 6.3 12.5 6. The above table summarizes the results of Kettlewell’s recapture experiment. Which of the following sentences is the best explanation of the results? a. Melanic moths survive best in rural areas, therefore, very few of them are recaptured
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Final_4pm - Midterm #1 4pm 1. The most recent estimates...

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