Coenobia

Coenobia is the plural of coenobium. It is a colony of cells formed by certain green algae, in which little or no specialization of the cells occurs. The cells are often embedded in a mucilaginous matrix. It is a colony with a fixed number of cells, and may be motile or non-motile.

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Examples include Volvox, Pandorina, Scenedesmus, Pediastrum, Hydrodictyon.

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Colony: In politics and in history, a colony is a territory under the immediate political control of a geographically-distant state (or city, in ancient times). Some colonies were historically separate countries, while others were territories without definite statehood at the moment of colonization. The me...

Cell: A cell is a single unit or compartment, enclosed by a border or wall. A cell is usually part of a larger structure. More specific meanings depend on the context in which the work is used....

Green alga: Chlorophyta Charophyta Streptophytina (Subdivision)The green algae are the large group of algae from which the embryophytes (higher plants) emerged. As such they form a paraphyletic group, variously included among the Plantae or with the Protista. The green algae include unicellular and colonial ...