Natural Science CLEP Prep Practice Exam

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Study for the Natural Science CLEP Exam. Prepare with interactive quizzes and questions that cover essential concepts in natural science to ensure you're ready for test day!

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Each practice test/flash card set has 50 randomly selected questions from a bank of over 500. You'll get a new set of questions each time!

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How do plants obtain energy?

  1. By consuming other organisms

  2. By respiration

  3. By photosynthesis

  4. By fermentation

The correct answer is: By photosynthesis

Plants obtain energy through the process of photosynthesis, in which they use sunlight, water, and carbon dioxide to produce glucose (sugar) and oxygen. Option A is incorrect because plants are autotrophs and do not consume other organisms for energy. Option B is incorrect because respiration is a process that occurs in both plants and animals, but it does not provide energy for plants. Option D is incorrect because fermentation is an anaerobic process that does not produce energy for plants.

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