Exam1 - Biol 322 Exam 1 1 According to the Theory of...

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Biol 322 Exam 1 1. According to the Theory of Special Creation: a) Species are immutable b) Species don’t give rise to new species c) life is recent, maybe 6000 years recent d) all of the above 2. Which of the following best describes vestigial structures? a) Vestigial structures are functionless or rudimentary homologs of characters that are functional in close relatives b) Vestigial structures don't exist in humans c) Vestigial structures are perfectly adapted for their particular functions d) Vestigial structures are similar structurally and functionally to comparable structures in other organisms 3. Homologous characters a) are similar in function b) are known only from gross anatomy, not from any other biological feature c) show underlying structural similarity even when their superficial structure is different d) are superficially similar e) result from convergent evolution 4. A point mutation a) duplicates genes b) is always a knockout mutation c) can create new alleles d) causes speciation in plants e) always substitutes a purine for a purine, never a purine for a pyrimidine 5. If a mutation would be beneficial, is it more likely to occur? a) Yes, because it helps the species survive b) No 6. Is a mutation in a gene that codes for a functional important product more likely to be a) good for organism fitness b) bad for organism fitness 7. A variant of a gene in a population is called a) a locus b) an allele c) a homolog d) recessive e) deleterious
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8. What is the equilibrium frequency of a beneficial allele if selection is the only evolutionary force? a) depends on how beneficial it is b) it is 1, that is it reaches fixation c) depends on if it is recessive or dominant d) is balanced by mutations 9. Underdominance means a) heterozygotes have higher fitness than one of the homozygotes b) w 11 > w 12 < w 22 c) the recessive allele is under the dominance of the other allele d) results in a stable equilibrium frequency where 0 < p < 1 10. Genetic drift a) is random change in allele frequency b) is important in small populations c) reduces the fitness of the individuals that have it d) accounts for most adaptive evolution e) answers a and b are correct, but c and d are not 11. Selection: a) means unequal fitness of phenotypes b) produces adaptation c) eliminates genetic variation d) increases mean fitness of the population e) all of the above
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Questions 13 – 14 relate to the following diagram. Orangutan Gorilla Pygmy Chimpanzee Chimpanzee Humans 13. A diagram of this type: a) can only have species and not higher taxa as the tips b) depicts genealogical relationships among taxa c) is called a phylogeny d) is based on homologous characters of the taxa e) answers b, c, and d are correct, but answer a is not.
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This note was uploaded on 02/02/2012 for the course ZOL 445 taught by Professor Williams,b during the Fall '08 term at Michigan State University.

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Exam1 - Biol 322 Exam 1 1 According to the Theory of...

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