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a sac-like structure in plant cells that contains the cell sap. It supports the cell and helps maintain its shape.
tough cartilage that acts as a shock absorber between vertebrae and at the ends of bones in ball...
hollow tubular vascular tissue cells, strengthened with lignin that conducts water and mineral...
a species that has a large effect on its environment relative to its abundance and plays an...
thin-walled or slightly strengthened, elongated phloem cells that conduct food substances.