What controls the opening and closing of stomata?
Show answer & explanation
Correct answer: B
Explanation
Correct Answer: Option 2 (Guard Cell)
Explanation:
The opening and closing of tiny pores (stomata) found in plant leaves is controlled by guard cells. When these cells fill with water, they swell, opening the stomata. Conversely, when water is lost, the cells shrink, closing the stomata.
Additional Facts
Function: Stomata primarily help in the exchange of gases (such as taking in carbon dioxide and releasing oxygen) and transpiration.
Structure: These cells are bean-shaped and contain chloroplasts.
Transpiration: Plants expel excess water as vapor through stomata.
Possible Questions for the Upcoming Exam
In which part of the plant are stomata primarily found?
(Answer: In leaves)
Which mineral element plays an important role in the opening and closing of stomata?
(Answer: Potassium ions - K+)
Which instrument is used to measure the rate of transpiration?
(Answer: Potometer)