Evaluate the statements about factors affecting photosynthesis.
a. Photosynthesis is influenced by internal (plant) and external factors.
b. Internal factors include the number, size, age, and orientation of leaves, mesophyll cells, chloroplasts, internal CO2 concentration, and the amount of chlorophyll.
c. Blackman’s Law of Limiting Factors states that the rate of a process is determined by the factor which is nearest to its minimal value.
d. There is a linear relationship between incident light and CO2 fixation rates at low light intensities.
e. Light saturation occurs at 10 percent of full sunlight, meaning light is rarely a limiting factor in nature for most plants.
f. Increase in incident light beyond the saturation point always increases the rate of photosynthesis.
g. Carbon dioxide is the major limiting factor for photosynthesis.
