Practice Quiz

CLEP Biology Practice Exam - Question List

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11. An endangered species is most vulnerable to extinction when it has which of the following characteristics?
  1. a high birthrate
  2. a large variety in its diet
  3. a small amount of competition
  4. a small amount of genetic diversity
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12. The amount of water a plant has in its tissues is determined primarily by the balance of which of the following processes?
  1. runoff and root absorption
  2. respiration and photosynthesis
  3. precipitation and photosynthesis
  4. root absorption and transpiration
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13. Which type of cell must contain a mutation in order for the mutation to be passed from a woman to her offspring?
  1. blood cell
  2. brain cell
  3. egg cell
  4. skin cell
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14. In tomato plants, the tall vine allele (T) is dominant to the short vine allele (t). Two tomato plants are crossed. Among the offspring plants grown from seed, 45% have tall vines and 55% have short vines.What are the most likely genotypes of the parent plants?
  1. TT and tt
  2. Tt and TT
  3. Tt and tt
  4. tt and tt
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15. Degenerative nerve diseases destroy nerve cells. These diseases can lead to paralysis by interfering with which of the following?
  1. transport of hormones that stimulate muscle cells
  2. production of ATP that is required by muscle cells
  3. transmission of electrochemical signals from the brain to muscle cells
  4. exchange of oxygen and carbon dioxide between neurons and muscle cells
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