Stomata open during the daytime because the guard cells
A. photosynthesize and produce osmotically active sugars
B. are thin walled
C. are bean shaped
D. have to help in gaseous exchange
Answer:A
Stomata open during the daytime because the guard cells
A. photosynthesize and produce osmotically active sugars B. are thin walled C. are bean shaped D. have to help in gaseous exchange