Question

At normal atmospheric carbon dioxide concentrations ,what limits the rate of photosynthesis?

Answer 1

Explanation:

Other limiting factors for the rate of photosynthesis are:

1. water

2. minerals

3. sunlight

4. internal factors:-

a) enzymes

b) hormones

Answer 2

Explanation:

Gradually the rate falls of and at a certain carbon dioxide concentration the rate of photosynthesis stays constant (from point B to C on the graph). Here a rise in carbon dioxide levels has no affect on the rate of photosynthesis as the other factors such as light intensity become limiting.