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Volvulina

Код 2409771

  • ISBN: 978-5-5113-8460-3

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Аннотация к книге "Volvulina"

High Quality Content by WIKIPEDIA articles! In taxonomy, Volvulina is a genus of colonial algae, specifically of the Volvocaceae. The colony (coenobium) is broadly ellipsoidal or spherical and consists of a fixed number of cells, usually 16 in mature individuals (rarely 4, 8 or 32). The cells are located at perphery of the coenobium and separated from each other by being embedded in a swollen sack. The cell body is lens-shaped or half spherical when mature with two flagella. The chloroplast is dish- or bowl-shaped. Pyrenoids may be present or absent, the stigma large. The nucleus is centrally located and there may be 4 to 8 contractile vacuoles. Sexual reproduction is by isogamy.

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ISBN: 978-5-5113-8460-3

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