Question

Choose the correct answers from the alternatives given.
Which of the following statements is not true about stomata?

• A. As guard cells become turgid, the stomata open
• B. There are two guard cells around each stoma
• C. Guard cells take up potassium ions and water enters the guard cells
• D. Guard cells surrounding stomata lack chloroplasts that other epidermal cells contain

Answer 1

Answer: (D)

Guard cells surrounding stomata lack chloroplasts that other epidermal cells contain

Stomata are the tiny openings found on the epidermis of the leaves and young green stems. The stomata are surrounded by two specialised epidermal cells called guard cells. They differ from the epidermal cells in their shape and in the presence of chloroplasts. Guard cells take up the potassium ions that help in making them turgid and hence help in their opening.

Hence,the correct answer is 'Guard cells surrounding stomata lack chloroplasts that other epidermal cells contain'.