Morphology
Red algae have double cell walls. The outer layers are usually composed of "pectic substances", from which agar can be manufactured. The internal walls are mostly cellulose.
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Famous quotes containing the word morphology:
“I ascribe a basic importance to the phenomenon of language.... To speak means to be in a position to use a certain syntax, to grasp the morphology of this or that language, but it means above all to assume a culture, to support the weight of a civilization.”
—Frantz Fanon (1925–1961)