question_answer

Which one gives the most valid and recent explanation for stomatal movements?                                           

A)          Transpiration

B)  Potassium influx and efflux

C)  Starch hydrolysis

D)  Guard cell photosynthesis

Correct Answer: B

Solution :

                Levitt in 1954 proposed active potassium transport theory, which is the most valid and recent explanation for stomatal movements. It is explained below as: It has been proved that the accumulation of \[{{K}^{+}}\] ion brings the opening of stomata and loss \[{{K}^{+}}\] ions, the closing of stomata.