What is the gas exchange mechanism of a sunflower?

Sunflowers, like other plants, primarily use stomata for gas exchange. These small openings on the underside of leaves allow carbon dioxide to enter for photosynthesis while enabling oxygen and water vapor to exit. The stomata can open and close to regulate gas exchange and minimize water loss, responding to environmental conditions such as light and humidity. Additionally, sunflowers have a unique adaptation called heliotropism, where they track the sun's movement, optimizing their leaf orientation for efficient photosynthesis and gas exchange.