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Transport in Plants — BIOLOGY STD 11 Science — Question

Gujarat BoardEnglish MediumSTD 11 ScienceBIOLOGYTransport in Plants1 Mark
MCQ
Stomata perform the function of:
  • ✓
    Gaseous exchange.
  • B
    Oxygen evolution.
  • C
    Carbon dioxide evolution.
  • D
    $CO_2$​ absorption.
✓

Answer

Correct option: A.
Gaseous exchange.
The stomata control gas exchange in the leaf. Each stoma can be open or closed, depending on how turgid its guard cells are.
In the light, the guard cells absorb water by osmosis, become turgid and the stoma opens.
In the dark, the guard cells lose water, become flaccid and the stoma closes.

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