How does the rate of photosynthesis vary with light intensity?
The rate of photosynthesis increases with light intensity, until it reaches an optimal level, after which any additional light intensity does not significantly increase the rate of photosynthesis.
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### Instruction:
How does the rate of photosynthesis vary with light intensity?

### Response:
The rate of photosynthesis increases with light intensity, until it reaches an optimal level, after which any additional light intensity does not significantly increase the rate of photosynthesis.