Q. What happens when photosynthesis begins?
During the first stage of photosynthesis, called the light-dependent reaction, sunlight excites the electrons in the chlorophyll pigment. The organism uses this energy to create the energy carrier molecules ATP and NADPH, which are crucial for carbon fixing during the second stage.
Q. What happens at the end of photosynthesis?
The end products of photosynthesis are Glucose, water and oxygen. **Most of the oxygen produced diffuses out into the atmosphere through the stomata in the leaves. This oxygen is used by all of us and other living organisms including plants during respiration.
Q. What happens when stomata opens and closes?
Stomata open and close to allow the intake of carbon dioxide and the release of oxygen. C. During the day, stomata close if the leaves experience a lack of water, such as during a drought. This may occur when the plant has lost an excessive amount of water.
Q. What controls opening and closing of stomata?
Guard cell function Guard cells are cells surrounding each stoma. They help to regulate the rate of transpiration by opening and closing the stomata.
Q. Which plant hormone helps in ripening of fruits?
ethylene
Q. What are the two main reasons why a plant would keep its stomata open when in its normal environment?
The two main functions of stomata are to allow for the uptake of carbon dioxide and to limit the loss of water due to evaporation. In many plants, stomata remain open during the day and closed at night. Stomata are open during the day because this is when photosynthesis typically occurs.
Q. How does temperature affect the opening and closing of stomata?
The opening of stomata with increasing temperature was apparently independent of the stomatal response regulated by atmospheric humidity. At high plant water stress, the stomatal response was reversed, i.e., the stomata closed when temperature was gradually increased.
