Stomata: The most important cells of the plant

Many people think a plant just, well — sits there. But under a microscope, pores called stomata on the plant's leaves are in constant motion, says Scott McAdam, assistant professor of botany and plant pathology. "The stomata are opening, they're closing, they're dynamically responding to the environment," McAdam says. "They're constantly receiving signals, and what's really cool about them is they respond fast, sometimes within a few minutes."

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