JAMB Biology 2023 Objective — Question 8
Question 8 of 40 from the Joint Admissions and Matriculation Board (JAMB) Biology 2023 Objective paper, with the correct answer and a full explanation.
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The opening of the guard cells of the epidermis in plants is by the process of
- A. diffusion
- B. osmosisCorrect
- C. active transportation
- D. transpiration
Explanation
Stomata (guard cells) open when the guard cells become turgid and close when they become flaccid; this turgidity change depends on the osmotic concentration/osmosis within the guard cells.
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