Question

multiple select question
select all that apply
the following diagram shows the change in the rate of photosynthesis as a function of the intensity of light under varying conditions. which of the following statements can be concluded based on the graph?
□ the rate of photosynthesis is limited by temperature at high light intensities.
□ the rate of photosynthesis remains constant at all light intensities.
□ the concentration of co₂ does not play a role in determining the rate of photo - synthesis.
□ the rate of photosynthesis is limited by the concentration of co₂ at high light in - tensities.
□ the rate of photosynthesis is limited by light at low light intensities.

Explanation:

1. At high light intensities, the rate of photosynthesis is higher at 35°C than at 20°C with excess CO₂, showing temperature - limitation.
2. The rate of photosynthesis increases with light intensity initially, so it doesn't remain constant.
3. Comparing the curves with excess and insufficient CO₂ at 20°C shows CO₂ concentration matters.
4. With insufficient CO₂, the rate plateaus at high light intensities, indicating CO₂ - limitation.
5. At low light intensities, increasing light intensity increases the rate, showing light - limitation.

Answer:

The rate of photosynthesis is limited by temperature at high light intensities.
The rate of photosynthesis is limited by the concentration of CO₂ at high light intensities.
The rate of photosynthesis is limited by light at low light intensities.