CLEP Biology Practice Exam

Category - Biology

Mallory has four aquatic plants of the same size and species. She submerges each plant in a separate beaker filled with 200 mL of water. She then sets each beaker under a different intensity of light. Mallory observes that, of the four plants, the plant in the beaker under the most intense light gives off the most gas bubbles in a 20 min period.Which of the following statements best explains Mallory’s observations?
  1. Cells decompose most quickly under the most intense light.
  2. Water evaporates from plants fastest under the most intense light.
  3. Photosynthesis occurs at the highest rate under the most intense light.
  4. Gases in the leaves of plants expand most under the most intense light.
Explanation
Answer: C - Photosynthesis occurs at the highest rate under the most intense light.
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