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Additional Plant Cell Structures. Druse & raphide crystals, because they are poisonous, are thought to be a defense mechanism against plant preditors .
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Additional Plant Cell Structures • Druse & raphide crystals, because they are poisonous, are thought to be a defense mechanism against plant preditors. • Amyloplasts are non-pigmented organelles found in some plant cells. They make & store starch granules, through the polymerization of glucose.