How is the opening and closing of stomatal pore regulated in plants?
A. It is a function of guard cells.
B. It is a function of cytoplasm.
C. It is a function of chloroplast.
D. it depends on sunlight. (1)
Answer:A
How is the opening and closing of stomatal pore regulated in plants?
A. It is a function of guard cells. B. It is a function of cytoplasm. C. It is a function of chloroplast. D. it depends on sunlight. (1)
Explanation: The opening and closing of stomatal pores is a function of guard cells. When water flows into guard cells, they swell up causing the stomatal pore to open. When the guard cells shrink, the pore closes.