Question

Select the correct statements from the following

(A) At high light intensities, plants show increase in rate of photosynthesis.

(B) Tropical plants have higher temperature optimum than the plants adapted to temperate climates.

(C) The effect of water as a factor is more through its effect on the plant, rather than directly on photosynthesis

• A. A & B
• B. B & C
• C. A & C
• D. A, B & C

Answer 1

The correct option is D

A, B & C

Plant show high rate of photosynthesis at increased light intensities and respond to high $C{O}_2$ conditions in a similar fashion. Tropical plants are better adapted to high temperatures compared to temperate plants. Water stress causes stomatal closure and reduces $C{O}_2$ availability, thereby indirectly affecting the rate of photosynthesis.