Question

Assertion: CAM plants lack structural compartmentation of leaf as found in C4 plants.

Reason: Stomata of CAM plants are open during the day.

• A. Both assertion and reason are true and reason is the correct explanation of assertion
• B. Both assertion and reason are true but reason is not the correct explanation of assertion
• C. Assertion is true but reason is false
• D. Both assertion and reason are false

Answer 1

The correct option is C Assertion is true but reason is false

CAM plants lack structural compartmentation of leaf as found in C4 plants (mesophyll cells and bundle sheath cells).
Stomata opens during night and closes during daytime. During the night, carbon dioxide enters and is fixed as organic acid in vacuoles of mesophyll cells.
During the day, the acid is converted back to carbon dioxide. With the sun shining, the light reactions can create energy for the Calvin cycle and the carbon dioxide can be converted into sugars.