Biology CLEP Prep 2025 – 400 Free Practice Questions to Pass the Exam

Question: 1 / 400

An example of an environmental factor that can affect the rate of photosynthesis in a plant is:

Humidity

Oxygen concentration

Air temperature

Amount of light

Photosynthesis is a process that allows plants to convert sunlight into energy. Light is an essential factor in this process because plants use chlorophyll to absorb light and produce sugars. The other options, humidity, oxygen concentration, and air temperature do play a part in the overall health and growth of plants, but they do not directly affect the rate of photosynthesis. Humidity can affect the plant's ability to retain water and maintain turgidity, while oxygen concentration and air temperature can impact the plant's respiration. Therefore, the amount of light is the most critical environmental factor for the rate of photosynthesis in a plant.

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