A) guard cells swell due to an increase in their water potential
B) guard cells swell by endosmosis due to influx of hydrogen ions (protons)
C) guard cells swell by endosmosis due to efflux of potassium ions
D) guard cells swell due to a decrease in their water potential
Correct Answer: D
Solution :
During day time, photosynthesis occurs in guard cells because they contain chloroplast. The soluble sugar formed by this process decreases the water potential of guard cells and hence, resulting in stomatal opening.
You need to login to perform this action.
You will be redirected in
3 sec
