Practice Quiz

CLEP Natural Sciences - Biological Science - Question List

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46. The fossil record supports which of the following descriptions of the evolution of life on Earth?
  1. Life first appeared with the diversity found today.
  2. The importance of natural selection diminished over time.
  3. Complex organisms evolved from more simple organisms.
  4. Large organisms appeared before single-celled organisms.
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47. In a eukaryotic cell, which of the following processes directly involves DNA?
  1. translation
  2. cellular respiration
  3. active transport of ions
  4. replication of chromosomes
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48. Heartburn is pain that occurs when acidic gastric juice is forced out of the upper end of the stomach. In which of the following organs does a person experience heartburn?
  1. pancreas
  2. esophagus
  3. small intestine
  4. large intestine
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49. The size of a bird population increased by two percent in one year. Which of the following could have contributed to the population increase?
  1. a decrease in the death rate ofbaby birds
  2. an increase in the number of the birds’ predators
  3. an increase in the average numberof parasites per bird
  4. a decrease in the immigration of birds of the same species
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50. In a molecule of double-stranded DNA, the amount of adenine present is always equal to the amount of
  1. cytosine.
  2. guanine.
  3. thymine.
  4. uracil.
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