Question

Among the following group of plants, select the plant where you find stomata open at night and
close by day time

Answer 1

Explanation:

cam plant is the only plant where you find stomata open at night and

close by day time

Answer 2

Many cacti and other succulent plants show the stomata open at night and close by day time.

Explanation:

• Stomata are mouth-like cellular complexes at the epidermis that regulate gas transfer between plants and the atmosphere.
• Many cacti and other succulent plants with CAM metabolism show the stomata open at night and close by day time.
• Crassulacean Acid Metabolism (CAM) Photosynthesis is the pathway where stomata open at night, allowing CO2 to diffuse into the leaf to be combined with PEP and form malate during the night; air temperatures are much lower at night than those of the day.
• CAM is an adaptation for increased water efficiency and is typically found in plants growing in arid conditions.
• Using this method, desert plants can pick up carbon dioxide at night when the air is cool and the risk of losing water is lower.