Chapter 13

Assertion: Current availability of \(\mathrm{CO}_{2}\) in atmosphere is limiting to \(\mathrm{C}_{4}\) plant. Reason: \(\mathrm{C}_{3}\) plants more efficiently fix \(\mathrm{CO}_{2}\) than \(\mathrm{C}_{4}\) plants.

Assertion: Dark reaction is controlled by temperature. Reason: Dark reaction is enzymatic reaction.

Assertion: Photosynthesis occurs only in green parts of plants. Reason: Green part of plant contains chlorophyll.