Multiple choice

What happens to the rate of photosynthesis as light intensity increases?

  1. It increases

  2. It decreases

  3. It decreases then levels off

  4. It increases then levels off
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

As light intensity increases, the rate of photosynthesis initially increases because light is the limiting factor. Eventually, the rate levels off when another factor, such as carbon dioxide concentration or temperature, becomes the limiting factor.

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