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a complex chemical compound that fills the spaces in the cell wall between cellulose, hemicellulose, and pectin components, especially in tracheid, sclereid and other xylem cells. This makes the cell walls hard, woody and waterproof.
animals that lack a cavity between the digestive tract and the outer body wall.
a tail-like structure that some prokaryotic and eukaryotic cells use for movement.
unicellular fungi, most of which reproduce asexually by a process called budding.
a small finger-like projection found on the inner folds of the small intestine, which increases...