Practice Quiz

SAT Biology Subject Test Practice Questions - Question List

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46. As the dominant plant of the area changes, the total biomass of the community __________.
  1. Increases
  2. Decreases
  3. Remains the same
  4. Decreases then increases
  5. Increases then decreases
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47. A flock of grasshopper sparrows moved into the area before the dominant plant changed from weeds to grasses. The grasshopper sparrow is the ____________.
  1. Primary organism
  2. Pioneer organism
  3. Secondary organism
  4. Tertiary organism
  5. Quaternary organism
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48. When oaks become the dominant plant in the area, the mixture of populations no longer creates changes in the environment. The community is now a climax community. Which of the following events could restart succession?
  1. Fire
  2. Volcanic eruption
  3. Logging
  4. Landslide
  5. All of the above
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49. Which of the following is NOT a characteristic of a climax community?
  1. The vegetation is tolerant of environmental conditions.
  2. The essential makeup of the populations within the community is in constant flux.
  3. The ecosystem is balanced between energy production and consumption.
  4. The size and life spans of the organisms is constant.
  5. There is a high level of species diversity.
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50. Which is true of ecological succession?
  1. Pioneer species move into the new communities first
  2. Climax communities have higher total biomass than preceding communities
  3. Species diversity increases with each stage of succession
  4. Climax communities do not change
  5. All of the above
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