Practice Quiz

IB Biology Exam Prep - Question List

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146.
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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147.
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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148.
Aquatic ecosystems tend to be dead zones near points at which nuclear power plants discharge water because of:
  1. High levels of acidity.
  2. Elevated background radiation.
  3. Decreased light penetration.
  4. Low dissolved oxygen content.
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149.
The presence of increased levels of nitrogen oxides in the atmosphere is an environmental concern because this can result in:
  1. A decrease in soil fertility as minerals are leached away.
  2. A decrease in the populations of nitrogen-fixing bacteria.
  3. An increase in the rate of ozone depletion in the atmosphere.
  4. An increase in the eutrophication of aquatic ecosystems.
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150.
The draining of wetlands for development leads directly to increases in which of the following environmental problems?
  1. Accumulation of pollutants.
  2. Flooding in adjacent habitats.
  3. Pressure on nearby landfills
  4. Establishment of exotic species.
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