Question

question: what happens when the stomata on a leaf are open? answer options: select one of four atmospheric nitrogen enters and is transformed. carbon dioxide enters, and water escapes. pollen can enter the leaf and fertilize the plant. sunlight enters the leaf until the stomata close.

Explanation:

Stomata are pores in leaves. When open, they allow gas exchange: carbon dioxide (needed for photosynthesis) enters, and water vapor (via transpiration) escapes. Nitrogen isn't mainly taken in via stomata for transformation, pollen doesn't fertilize via leaf stomata, and sunlight doesn't enter through stomata (it hits the leaf surface). So the correct option is the one about carbon dioxide entering and water escaping.

Answer:

Carbon dioxide enters, and water escapes.