Practice Quiz

CLEP Natural Sciences - Biological Science - Question List

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51. Which of the following statements best explains why oxygen diffuses from the alveoli into the blood?
  1. The diaphragm draws oxygen into the alveoli at a rapid speed.
  2. Alveoli cells contain hemoglobin to transfer gases to the blood.
  3. The concentration of oxygen is greater in the alveoli than in the blood.
  4. Red blood cells move one at a time through the capillaries surrounding the alveoli.
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52. Which of the following statements gives the most likely explanation for the presence of two very similar species of squirrels living on opposite sides of the Grand Canyon?
  1. One squirrel traveled across the canyon and started a new population on the other side.
  2. One squirrel traveled across the canyon and interbred with a different population on the other side.
  3. Members of a single squirrel species were geographically separated by the formation of the canyon.
  4. Members of two different squirrel species migrated from two different places to opposite sides of the canyon.
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53. Energy for most chemical reactions in cells is supplied by which of the following molecules?
  1. ATP
  2. DNA
  3. adrenaline
  4. hemoglobin
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54. When locust populations grow too large for an area, the individual locusts are crowded and food becomes scarce. In response to these conditions, some of the locusts leave the area and find a new habitat. Which of the following terms best applies to the response of the locusts that leave for the new habitat?
  1. commensalism
  2. emigration
  3. hibernation
  4. mutualism
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55. Which of the following statements best explains why offspring produced by sexual reproduction often look similar to, but not exactly the same as, their parents?
  1. The offspring have genetic material from both the mother and the father.
  2. The cells of the offspring contain all the dominant genes from the parents.
  3. The cells of the offspring undergo mitosis many times as the offspring grow and develop.
  4. The offspring have a period of embryonic development, rather than being born immediately after fertilization.
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