Question

The three cardinal points related to photosynthesis was proposed by

• A. Blackman
• B. Sachs
• C. Roger Slack
• D. None of the above

Answer 1

Answer: (B)

Sachs

Blackman's Law of limiting factors are the various factors which affect the rate of photosynthesis. It is considered that when the other factors are constant, the factor which is least or minimum has the direct effect on the rate of photosynthesis. Sachs developed three cardinal points for each factor which affects the rate of photosynthesis. These cardinals have minimum, optimum and maximum values.

Thus, the correct answer is option B.