Question

Read the given statements and select the correct option.
Statement 1 : Crassulacean acid metabolism occurs in succulent plants which grow in xeric conditions.
Statement 2 : Stomata are generally sunken in succulent plants.

• A. Both statements 1 and 2 are correct
• B. Statement 1 is correct but statement 2 is incorrect
• C. Statement 1 is incorrect but statement 2 is correct
• D. Both statements 1 and 2 are incorrect

Answer 1

Answer: (A)

Crassulacean acid metabolism is a mechanism of photosynthesis involving double fixation of $C{O}_2$ which occurs in succulents belonging to Crassulaceae, Cacti, Euphorbias and some other plants of dry habitats where the stomata remain closed during the daytime and open only at night, e.g., Sedum, Kalanchoe, Opuntia. Sunken stomata are deep seated stomata in which subsidiary cells lie above the guard cells.