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in Transport in Plants by (54.1k points)

The opening and closing of stomata depends upon the change in pH of guard cells. This is observed by: 

(a) Loftfield 

(b) Sayre 

(c) Von Mohl 

(d) Amstrong

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1 Answer

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by (53.6k points)

Correct Answer is: (b) Sayre

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