Page 97 - Photosynthesis: The Green Miracle
P. 97
Harun Yahya
Guard cell
a. b.
Stoma in open state
A) As a stoma opens, first potassium and then water enter the guard cell.
This raises the internal pressure, causing the stoma to open. B) As a
stoma closes, first potassium and then water leave, lowering the
pressure and causing the stoma to close.
seen. This unit is not just a sentry at the gate, but a security mechanism
capable of deciding on its own, which monitors the internal and external
environment and an emergency exit with a complete awareness of the en-
tire plant.
A cotton plant (above) and pineapple plant (right)
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