NEET BIOLOGY

Detailed explanation-1: -Final answer: When the guard cells swell due to the entry of water the stomata get open due to the osmotic potential.

Detailed explanation-2: -Stomata are made up of two guard cells that can swell or shrink. Swelling opens the stomata and shrinking closes the stomata. In most plants, stomata open in response to light, to allow the entry of atmo-spheric CO2 for photosynthesis, and that happens at the expense of extensive water loss via the open stomata.

Detailed explanation-3: -Guard cells are a pair of two cells that surround each stoma opening. To open, the cells are triggered by one of many possible environmental or chemical signals. These can include strong sunlight or higher than average levels of carbon dioxide inside the cell.

Detailed explanation-4: -Guard cells are cells surrounding each stoma. They help to regulate the rate of transpiration by opening and closing the stomata. Light is the main trigger for the opening or closing.

Detailed explanation-5: -Stomata close when the guard cells lose water and become flaccid. This occurs because potassium ions move back out of the guard cell, followed by water that lowers the pressure in the guard cell.