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4 Written questions

3 Matching questions

  1. in certain species crosses, such as that between the horse and the donkey, offspring are produced but usually sterile. the most common explanation of this result is that
    A. the chromosomes of the two species differ too much to pair properly in meiosis
    B. the two species differ too much in behavior to be able to mate successfully
    C. embryological development in the two species are incompatible
    D. hormonal differences between the two species prevent proper development of the sex gametes
  2. over ten inches of precipitation per year. long cold winters and short summers. dominant vegetation is gymnosperm
    A. tropical rain forest
    B. taiga
    C. arctic tundra
    D. temperate grassland
    E. desert
  3. 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
  1. a A
  2. b D
  3. c B

5 Multiple choice questions

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

5 True/False questions

  1. the different species of finches on the galapagos islands are believed to have arisen as a result of natural selection acting on populations of finches that had experienced
    A. convergent evolution
    B. gene flow
    C. the bottleneck effect
    D. geographic isolation
    E. hybrid sterility
    D

          

  2. A LARGE POPULATION OF LAB AANIMALS HAS BEEN ALLOWED TO BREED RANDOMLY FOR A NUMBER OF GENERATIONS. AFTER SEVERAL GENERATIONS, 49% OF THE ANIMALS DISPLAY A RECESSIVE TRAIT aa THE SAME PERCENTAGE AS AT THE BEGGINING OF THE BREEDING PROGRAM. THE REST OF THE ANIMALS SHOW THE DOMINANT PHENOTYPE, WITH HETEROZYGOTES INDISTINGUISHABLE FROM THE HOMOZYGOUS DOMINANTS.
    what is the estimated frequency of allele a in the gene pool?
    A. 0.51
    B. 0.49
    C. 0.70
    D. 0.30
    E. 0.07
    C

          

  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
    C

          

  4. 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
    E

          

  5. the establishment of a genetically unique population through genetic drift
    A. founder effect
    B. kin selection
    C. competitive exclusion
    D. adaptive radiation
    E. convergent evolution
    C

          

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