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Unformatted text preview: outer wall balloons outward, causing the stomata to open • Opening: water enters, cells swell, stoma opens. • Closing: water leaves, cell shrink, stoma closes. Factors that control stomata opening and closing: 1. Carbon dioxide concentration-When concentration in the leaf falls the guard cells become turgid and the stomata open 2. Humidity a. Stomates close on hot, dry, windy days b. At dawn a sudden increase in stomatal opening, reaching maximum near noon, is followed by a decline because of water loss How do stomata open? • Active transport AND osmosis: Chloroplast Structure ( fig. 7-2c) • Has own circular genome • Inner and outer membrane; Stroma; Thylakoids; granum • Thylakoids are hollow...
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