Practice Quiz

CLEP Natural Sciences - Biological Science - Question List

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41. Which of the following statements best compares individual Y and individual Z in terms of genotype and phenotype?
  1. The individuals have the same genotype and the same phenotype.
  2. The individuals have the same genotype but different phenotypes.
  3. The individuals have different genotypes but the same phenotype.
  4. The individuals have different genotypes and different phenotypes.
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42. About 70 years ago, cane toads were introduced to Australia. The toads are toxic to some species of snakes, such as Dendrelaphis punctulatus. The longer an individual snake is, the greater its chance of survival after eating a cane toad. Which of the following did scientists most likely observe in the D. punctulatus snake population as a result of the presence of the cane toads?
  1. The entire population was killed by the toads.
  2. The entire population became resistant to the toads.
  3. The average body length in the population increased.
  4. The average body length in the population decreased.
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43. Which of the following is a body system response that adjusts body temperature when it is higher than normal?
  1. Breathing rate begins to decrease.
  2. Blood vessels near the skin constrict.
  3. Sweat glands produce and secrete sweat.
  4. Hormones increase the metabolic rate of the liver.
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44. An inherited metabolic disorder called phenylketonuria (PKU) can result in serious problems in infancy. The chance that two parents who are heterozygous will have a child with PKU is 25%. Which of the following terms best applies to the inheritance pattern for PKU?
  1. codominant
  2. dominant
  3. recessive
  4. sex-linked
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45. Which of the following describes plant cells but not animal cells?
  1. The nucleus contains the chromosomes.
  2. The ribosomes assist in protein synthesis.
  3. Plastids store starch made during photosynthesis.
  4. Mitochondria produce energy through respiration.
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