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Stomata of a plant open due to
A. The influx of potassium ions
B. Efflux of potassium ions
C. The influx of hydrogens ions
D. The influx of calcium ions

Answer
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Hint: Respiration is also done by plants. Tiny openings are the part from which plants breathe. This tiny opening is called stomata. To intake the carbon dioxide and release the oxygen as a waste element is done by stomata.

Complete answer:
The most widely accepted theory for opening and closing of guard cells kind of is the malate or potassium ion particularly pump theory, first proposed by Levitt, 1974, which is fairly significant. As potassium ions levels increase in the guard cells, the water particularly the potential of the guard cells drops, and water enters the guard cells in a very kind of major way, which for the most part is quite significant.
Chloride ions are also absorbed from outside to mostly maintain electroneutrality, which shows that according to this theory, a rise in pH of guard cells, causes hydrolysis of starch to form phosphoenolpyruvate (PEP) subtly. As a result of the accumulation of ions there is a reduction in water potential of guard cells, so according to this theory, a rise in pH of guard cells, causes hydrolysis of starch to form phosphoenolpyruvate (PEP), generally contrary to popular belief.
The reduction in water fairly sort of potential causes absorption of water from adjacent cells, guard cells definitely for the most part become turgid and stomata open, so stomata of a plant open really due to influx of potassium ions in a subtle way, which for the most part is fairly significant.
So, the correct answer is “Option A”.

Note:
On the underside of leaves stomata are found. Stomata are microscopic pores in size. As discussed stomata have some important responsibilities during photosynthesis. Respiration of plant is primary responsibility and transpiration is also the other responsibility of stomata