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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.
the movement of molecules across a membrane against the concentration gradient, from an area of...
a species that has a large effect on its environment relative to its abundance and plays an...
simple epithelium with flattened cells found in the inner lining of the mouth, oesophagus and...