NEET Biology Transport In Plants Based Practice Questions & Answers with Viewers Discussion and Detailed Explanation

Answer: (c)

There is evidence to believe that besides organic acids the turgidity of guard cells is usually controlled by $K^{+}$ , $Cl^{-}$ and $H^{+}$ . The opening of stomata is initiated by exertion of $H^{+}$ by guard cells, intake if $K^{+}$ and $Cl^{-}$ , disappearance of starch and appearance of organic acids like malic acid.