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4 Written Questions

4 Matching Questions

  1. 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
  2. fossils of some intermediate forms have not been found because
    A. new types of organisms can appear suddenly without progressive changes determined by natural selection
    B. fossils are very rare; fossils of only a small fraction of species have been found
    C. all fossils are the same age
    D. species produced by punctuated equilibrium do not leave fossils
    E. the ages of many fossils are not calculated correctly
  3. all of the following are criteria for maintaining an HW equilibrium involving two alleles except
    A. gene flow from other populations must be zero
    B. there should be no natural selection
    C. the frequency of all genotypes must be equal
    D. matings must be random
    E. populations must be large
  4. although the seal and the penguin both have streamlines, fish-like bodies with a layer of insulating fat, they arent closely related. this similarity results from
    A. convergent evolution
    B. adaptive radiation
    C. homologous evolution
    D. coevolution
    E. analogous evolution
  1. a A
  2. b D
  3. c C
  4. d B

5 Multiple Choice Questions

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

5 True/False Questions

  1. 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

          

  2. the difference in cricket calls among sympatric species of crickets are examples of
    A.habitat isolation
    B. temporal isolation
    C. physiological isolation
    D. behavioral isolation
    E. geographical isolation
    D

          

  3. 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
    E

          

  4. 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 proportion of the population is probably heterozygous Aa for this trait?
    A. o.07
    B. 0.42
    C. 0.51
    D. 0.09
    E. 0.21
    B

          

  5. all of the following are required for natural selection to create evolutionary change in a population except:
    A. variation in size or health of genetically identical individuals that is caused by environmental factors.
    B. genetic variation exists in a population
    C. individuals that have superior traits produce more offspring than less fit individuals
    D. genes that produce superior traits are passed to offspring
    C

          

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