1.

The opening and closing of the stomatal pore depends upon.1 pointTemperatureOxygenConcentration of CO2 in stomataWater in guard cell​

Answer»

Answer:

When a pair of guard cells surrounding a stoma receives the signal to OPEN the stomatal pore, it is filled with water, thus CHANGING the cell's shape and opening the pore. When guard cells receive a signal to CLOSE the stoma. This initiates a loss of water and causes them to shrink and the pore closes. Thus, the correct answer is option C.

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