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(a) Leaf surfaces contain stomata.

(a) Leaf surfaces contain stomata. Leaf surface. 20  m. Guard cells  Pore  Stoma. (b) Carbon dioxide diffuses into leaves through stomata. Interior of leaf. O 2. H 2 O. Leaf surface. Photosynthetic cells. Extracellular space. CO 2. Stoma. Wavelengths (nm). Gamma

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(a) Leaf surfaces contain stomata.

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  1. (a) Leaf surfaces contain stomata. Leaf surface 20 m Guard cells  Pore  Stoma (b) Carbon dioxide diffuses into leaves through stomata. Interior of leaf O2 H2O Leaf surface Photosynthetic cells Extracellular space CO2 Stoma

  2. Wavelengths (nm) Gamma rays Ultra- violet Micro- waves Radio waves X-rays Infrared Shorter wavelength Longer wavelength Visible light Lower energy Higher energy

  3. In plants, cells that photosynthesize typically have 40–50 chloroplasts 10 m Chloroplast Outer membrane Inner membrane 0.5 m Thylakoids (flattened sacs) Granum (stack of thylakoids) Stroma (liquid matrix)

  4. or or FLUORESCENCE RESONANCE REDUCTION/OXIDATION Electron drops back down to lower energy level; heat and fluorescence are emitted. Energy in electron is transferred to nearby pigment. Electron is transferred to a new compound. Higher -carotene Chlorophyll Fluorescence Photon  Heat Energy of electron Photon Chlorophyll molecule Chlorophyll and -carotene molecules in antenna complex Lower Reaction center

  5. Slide 6 Electron transport chain Figure 10-14 Higher Electron transport chain 4 Photons Energy of electron 4 Photons produced via proton-motive force Photosystem I Photosystem II Lower

  6. Higher Photon Energy of electron P700 produced via proton-motive force Photosystem I Lower

  7. Chloroplast Granum (stack of thylakoids) Stroma (liquid matrix) Thylakoid membranes Cytochrome complex Photosystem II Photosystem I ATP synthase Most abundant in the thylakoid membranes of granum Most abundant in the thylakoid membranes exterior to granum

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