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Which muscle separates the thorax and abdomen and aids in breathing? a. pectoral b. intercostal c. diaphragm d. sternum
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Mutations associated with albinism affect proteins involved in synthesis
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Which best describes meiosis? a. it produces cells that are identical to the original cell b. it is responsible for the replacement of damaged skin cells c. it is responsible for growth of the organism d. it produces male and female sex cells
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The similarities of organisms in which two areas numbered above provide the best evidence for common ancestry between organisms in both locations?
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Which of the following statements is true about the relationship between genetic variation and natural selection? a. genetic variation must be present in a population before natural selection can act on it. b. genetic variation arises in a population as a result of natural selection. c. natural selection can act on a population whether there is genetic variation within the population or not. d. after natural selection acts on a population, the amount of genetic variation in the population always increases.
Answers: 1
Which muscle separates the thorax and abdomen and aids in breathing? a. pectoral b. intercostal c....
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