Practice Quiz

MTEL Biology Practice Exam - Question List

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86.
The phosphorus cycle differs from the carbon and nitrogen cycles in that phosphorus is:
  1. In the same chemical form throughout its cycle.
  2. Not produced as a result of human activities.
  3. Not in a gas phase during any part of its cycle.
  4. Rarely a limiting factor in ecosystems.
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87.
Which of the following statements about the carbon cycle is accurate?
  1. Decomposers and other heterotrophs absorb carbon dioxide from the atmosphere during respiration.
  2. Historically, calcium carbonate from dead organisms has been a primary reservoir of carbon stored in ocean sediments.
  3. The main source of carbon dioxide returning to the atmosphere is the respiration of terrestrial consumers from the higher trophic levels.
  4. More carbon dioxide is absorbed by an acre of living trees in a year than is released by an acre of trees burning during a fire.
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88.
The use of phosphate-free detergents has been very effective in cleaning up lakes and rivers. This is because in freshwater ecosystems phosphorus:
  1. Presents osmoregulatory difficulties for zooplankton.
  2. Lowers the pH as a result of increased carbon dioxide levels.
  3. Accumulates in the brown fatty tissues of fish.
  4. Is the limiting nutrient for algal growth.
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89.
The productivity of fisheries over areas of regular oceanic upwellings is evidence that which of the following conditions is often limiting in open ocean ecosystems?
  1. Nutrient availability.
  2. Light intensity.
  3. Salinity level.
  4. Water temperature.
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90.
The primary benefit of contour plowing on a farm is that it:
  1. Increases organic matter and helps maintain soil structure.
  2. Reduces the need for irrigation and cultivation.
  3. Increases the angle and availability of incident light.
  4. Reduces soil erosion due to water runoff.
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