Kaplan Nursing Entrance Practice Exam 2025 – The All-in-One Guide to Exam Success!

The primary function of stomata in plants during the day is gas exchange. Stomata are small openings found primarily on the underside of leaves that allow for the exchange of gases between the internal tissues of the plant and the external environment. During daylight, stomata open to facilitate the uptake of carbon dioxide, which is essential for photosynthesis, the process by which plants convert light energy into chemical energy in the form of glucose.

Simultaneously, oxygen, a byproduct of photosynthesis, is released through these openings. This gas exchange is critical for the plant's metabolism and overall health. While photosynthesis occurs in conjunction with stomatal function, the primary role of stomata is focused on exchanging gases rather than the photosynthesis process itself.

Stomata also help manage water loss through transpiration, but their main role in daytime is to ensure that the necessary gases can enter and exit the plant effectively for optimal growth and energy production.