photosynthesis. photosynthesis photosynthesis is the process by which plants, some bacteria, and...
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Plant StructureTRANSCRIPT
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PhotosynthesisPhotosynthesis
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PhotosynthesisPhotosynthesis
• Photosynthesis is the process by which plants, some bacteria, and some protistans use energy from sunlight to produce energy that is stored in the bonds of sugar
CO2 + H2O C6H12O6 + O2
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Plant StructurePlant Structure
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PhotosynthesisPhotosynthesis
• Photosynthesis takes place primarily in plant leaves with little to none occurring in stems, and roots.
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Leaf StructureLeaf Structure
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Leaf StructureLeaf Structure
• The parts of a typical leaf include the upper and lower epidermis, the mesophyll, the vascular bundle(s) (veins), and the stomates.
• The upper and lower epidermal cells do not have chloroplasts, thus photosynthesis does not occur there. They serve primarily as protection for the rest of the leaf.
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Leaf StructureLeaf Structure
• The stomates are holes which occur primarily in the lower epidermis and are for air exchange: they let CO2 in and O2 out.
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• The vascular bundles or veins in a leaf are part of the plant's transportation system, moving water and minerals (xylem) and nutrients (phloem) throughout as needed.
• The mesophyll cells have chloroplasts and this is where photosynthesis occurs.
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Leaf StructureLeaf Structure
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ChloroplastsChloroplasts
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ChloroplastsChloroplasts
• The conversion of sunlight energy into usable chemical energy is associated with the actions of the green pigment chlorophyll which is located in the chloroplast.
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CholoroplastsCholoroplasts
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ChloroplastsChloroplasts