What causes the stoma to open?
A. When the guard cells are full of water, they become stiff and hold
the pore open.
B. When the guard cells get covered in wax, they become limp and
the pore opens
C. When the guard cells are empty, they become limp and the pore
opens.
D. When the guard cells inflate with oxygen, they become stiff and
the pore opens.

Respuesta :

Answer:

a when the guard cells are full of water a pex

Explanation:

A. When the guard cells are full of water, they become stiff and hold

the pore open.

  • Two guard cells make up the stomata. The walls of these cells are thicker on the inside than they are on the outside.
  • Stomata open when they take in water and close when they lose water due to the unequal thickness of the paired guard cells.
  • When stomata open, they release water vapor and other gases into the atmosphere, including oxygen.
  • A. When the guard cells are full of water, stoma become stiff and hold the pore open

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