Question

if the leaves of a geranium plant receive an adequate supply of raw materials, which graph below shows how the rate of photosynthesis is related to increasing light intensity received by the plant? a. graph with rate of photosynthesis and light intensity where rate of photosynthesis is a horizontal line b. graph with rate of photosynthesis and light intensity where rate of photosynthesis increases linearly with light intensity c. graph with rate of photosynthesis and light intensity where rate of photosynthesis decreases linearly with light intensity d. graph with rate of photosynthesis and light intensity where rate of photosynthesis increases and then plateaus

Explanation:

Photosynthesis rate initially increases with light intensity as more light - energy is available for the light - dependent reactions. However, there comes a point where other factors (like enzyme saturation, CO₂ availability etc.) limit the rate and it plateaus. Graph D shows this pattern.

Answer:

D.