NEET Biology question

Which of the following statements is not true for stomatal apparatus?

(A)Guard cells invariably possess chloroplasts and mitochondria
(B)Guard cells are always surrounded by subsidiary cellsCorrect
(C)Stomata are involved in gaseous exchange
(D)Inner wall of guard cells are thick

Answer: (B)

Solution

Guard cells always possess chloroplasts and mitochondria (statement A, true), stomata are indeed involved in gaseous exchange (statement C, true), and their inner (pore-facing) wall is thick/inelastic while the outer wall is thin (statement D, true).

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Question ID VK-105682