presence of a pore
increase in solute concentration in the guard cells
presence of guard cells
decrease in solute concentration in the guard cells
Explanation
Video Explanation
Post your Contribution
Discussions (22)
The selected answer is wrong:
Turgidity of the guard cell quicken the opening of the stomata. Turgidity occurs when a cell is placed in hypotonic solution. Turgidity results in the decrease of the cell's concentration. This hence makes the answer D
Myschool admin, you are wrong for choosing option C just because guard cells regulates both the closing and opening of the stoma. You guys are wrong for choosing that guard cells only regulates closing of the stoma. The answer should rather be option B, because stoma opens when there is a high concentration of pottasium ions. Please don't confuse us.
Here is an explanation:
Turgidity of the guard cell quicken the opening of the stomata. Turgidity occurs when a cell is placed in hypotonic solution. Turgidity results in the decrease of the cell's concentration. This hence makes the answer D
REF: Check: Tonad Essential Biology, page 162 and 257
The Opening and closing of the stomata is generally controlled by the guard cells. Specifically to the opening of the stomata; increase in the solute concentration of the guard cells triggers the opening and vise versa.
This being said, it's correct ✍️
Funke, i don't know where you got your wrong answer from becauseturgidity is
caused by the
accumulation of K
(potassium ions) in the
guard cells. As K levels
increase in the guard
cells, the water
potential of the guard
cells drops, and water
enters the guard cells. Please google search the corect answer
Sorri It Was "C", See the image on this link 4 Beta Expl. https://upload.wikimedia.org/wikipedia/commons/thumb/2/20/Guard_cells_signals.png/300px-Guard_cells_signals.png
The opening of the stoma is controlled by the:
**B. increase in solute concentration in the guard cells**
When the solute concentration in the guard cells increases, water enters the guard cells by osmosis, causing them to swell and open the stoma. Conversely, a decrease in solute concentration leads to water leaving the guard cells, causing them to shrink and close the stoma.
the opening of the stoma is controlled by the decrease in solute concentration in guard cells because movement of substances in a leaf of a plant is osmotic (osmosis is the movement of water molecules from a region of higher concentration to lower concentration.)
