Question

Guard cells of stoma are ____.

• A. irregular in shape
• B. convex in shape
• C. long and cylindrical in shape
• D. kidney-shaped

Answer 1

The correct option is D

kidney-shaped

Stomata are tiny openings or pores that are used for gaseous exchange. They are mostly found on the under-surface of plant leaves. Air enters the plant through these openings. The carbon dioxide from the air is taken through these tiny pores to carry out the process called photosynthesis. Guard cells are cells surrounding each stoma. They help to regulate the rate of transpiration by opening and closing the stomata. They are kidney shape.