← Biology (0610)
Q1 / 5
Photosynthesis
Higher
2 marks
What is the effect of increasing CO2 concentration on the rate of photosynthesis (at constant light and temperature)?
A
Rate increases until another factor (light or temperature) becomes limiting, then plateaus
B
Rate decreases because excess CO2 inhibits chlorophyll
C
Rate is unaffected because CO2 is never limiting
D
Rate increases indefinitely as more CO2 is added
Need a hint?