Practice Quiz

Praxis II: Biology Content Knowledge Exam Prep - Question List

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76.

Typically only 10% of the energy in one trophic level is passed on to the next. If the producers make 10^9 kcal of energy, how much energy will be available to the tertiary consumers?

  1. 108 kcal
  2. 107 kcal
  3. 106 kcal
  4. 105 kcal
  5. 104 kcal
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77.

Which of the following statements about the r/K selection theory is false?

  1. Most organisms actually display both r- and K-traits.
  2. R-traits predominate in unstable environments.
  3. k-traits predominate in unstable environments.
  4. R-traits are typical when organisms need to be able to effectively compete for resources.
  5. R-traits are dominant in individuals that must reproduce quickly.
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78.

Which of the following is not a biotic factor?

  1. Spider silk
  2. Crude oil
  3. Bone
  4. Straw
  5. Water
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79.

When two populations have overlapping niches, which of the following ecological processes can occur?

I. Predation
II. Competition
III. Symbiosis

  1. II only
  2. III only
  3. I and II only
  4. II and III only
  5. I, II, and III
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80. What term describes the evolutionary process by which new species arise?
  1. Adaptive radiation
  2. Lamarkism
  3. Speciation
  4. Natural selection
  5. Sexual selection
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