Like nostrils for plants, stomata manage gas exchange for photosynthesis. Botanists study how stoma size changes in response to sunlight.
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Non-human Usage
Stoma is specifically for plant and animal biology contexts, not human anatomy. Researchers observed how the guards cells control the stoma in leaves.
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Climate Connection
Stomata can indicate environmental conditions and are important in climate studies. Ancient plant stomata suggest a high carbon dioxide concentration in the past.