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a thin, flexible layer of the plant cell wall inside the middle lamella. It consists mainly of cellulose, hemicellulose and pectin as well as cutin and wax where it forms the cuticle.
a biological membrane that separates the interior of all cells from the outside environment.
a mass of undifferentiated cells resulting from uncontrolled mitotic cell division in body...
a sensation of unease and discomfort in the upper stomach with an involuntary urge to vomit. A...
tough connective tissue found in conjunction with muscle, cartilage and bone.