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4 Written Questions

4 Matching Questions

  1. which of the following best explains why there are seldom more than five trophic levels in a food chain?
    A. most carnivores function at more than one trophic level
    B. trophic levels above this number contain too many individuals
    C. top carnivores are too few in the number to prey effectively
    D. the ecosystem contains too much biomass
    E. energy is lost from each trophic level
  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 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
  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. if a population that contains 16% homozygous recessive individuals(blue eyes)and 84% individuals with brown eyes (homozygous dominant and heterozygotes), what is the frequency of the dominant allele in the population?
    A. 0.6
    B. 0.4
    C. 0.32
    D. 0.64
    E. 0.8
  1. a C
  2. b E
  3. c A
  4. d B

5 Multiple Choice Questions

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

5 True/False Questions

  1. greatest diversity of species
    A. tropical rain forest
    B. taiga
    C. arctic tundra
    D. temperate grassland
    E. desert
    B

          

  2. assuming that the population was in HWE for the g locus, what percentage of gray moths emerged in 1980 was heterozygous
    A. 0%
    B. 25%
    C. 33%
    D. 67%
    E. 100%
    D

          

  3. assuming that the population was in HWE for the g locus, what was the frequency of allele g in the moths that emerged in 1980?
    A. 0.33
    B. 0.50
    C. 0.67
    D. 0.75
    E. 1.00
    D

          

  4. all of the following are density-dependent factors that limit animal populations EXCEPT
    A. weather
    B. predation
    C. birthrate
    D. food competition
    E. mortality
    A

          

  5. all of the following statements about characteristics of predator-prey relationships are true EXCEPT:
    A. a rise in the population of a prey is followed by a rise in the population of predators
    B. a rise in population of predators is followed by a decrease in prey
    C. camouflage is an adaptation that protects prey
    D. the production of large numbers of offspring within very short periods of time ensures the survival of some prey populations
    E. the population of predators most often eliminates the population of prey.
    C

          

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