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4 Written questions

3 Matching questions

  1. for some traits such as birth weight, natural selection favors individuals that are average and the extremes are selected against this is known as:
    A. diversifying selection
    B. directional selection
    C. adaptive radiation
    D. disruptive selection
    E. stabilizing selection
  2. during which of the following periods could the population have been in HW E for the G locus?
    1 1960-1964
    2 1965-1972
    3 1973-1980

    A. 1 only
    B. 2 only
    C. 3 only
    D. 1 and 3 only
    E. 1, 2, and 3
  3. which of the following is probably the best explanation for the fact that Antarctic penguins cant fly, although there is evidence that millions of years ago their ancestors could do so?
    A. penguins live on land and feed in the water, therefore they have no need to fly
    B. the antarctic home of penguins is flat and barren, so there's no place to fly
    C. ancestral penguins without large wings were better able to swim and feed in water, so they passed their genes for shorter wing structure to their offspring
    D. ancestral penguins didnt use their wings for long periods of time, so todays penguins have tiny nonfunctional wings
  1. a C
  2. b D
  3. c E

5 Multiple choice questions

  1. B
  2. A
  3. B
  4. A
  5. A

5 True/False questions

  1. which of the following statements best describes the effect of a genetic drift on the gene frequencies of a population?
    A. genes enter a population through immigration, thus changing gene frequencies
    B. genes leave a population through emigration, tus changing gene frequencies
    C. chance alone can cause significant changes in gene frequencies of small populations
    D. Mutations over time cause gene frequencies to change


  2. the bones of a human arm are homologous to structures in all of the following EXCEPT a
    A. whale flipper
    B. bat wing
    C. butterfly wing
    D. bird wing
    E. frog forelimb


  3. which of the following is an example of convergent evolution
    A. similar amino acid sequences of hemoglobin in humans and chimps
    B. similar bones in the forelimbs of horses and bats
    C. similar body shape of dolphins and fish
    D. different beak shapes of galapogas finches
    E. similar plant species on islands and the nearest continent


  4. lack of water common in summer; seasonal temp variations; maintained by periodic fires
    A. tropical rain forest
    B. taiga
    C. arctic tundra
    D. temperate grassland
    E. desert


  5. DNA sequences can be used to determine the evolutionary relationships of species because
    A. organisms with similar anatomy will develop similar dna sequences by convergent mutations
    B. dna sequences for proteins never change, so two species that have the same protein will have hte same dna sequences
    C. natural selection causes organisms that live in similar environmental conditions to have the same mutations in their dna sequences
    D. mutations occur randomly in dna at a steady rate, so the number of dna difference is equivalent to the time since a pair of species that shared a common ancestor


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