What is the function of scales in RICCIA?
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Protection from grazing animals
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The function of scales in RICCIA is protection from grazing animals.
Scales are violet-colored multicellular, single-cell thick structures. The violet color comes from the anthocyanin pigment. The ventral surface of the thallus is frequently covered in scales. In Riccia's young thallus, they can be arranged in a single row. Riccia's scales are ligulate. Scales protect the growing point by hiding sensitive cells and secreting slime to keep them wet. Several aquatic members of the Marchantiales order lack scales.
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