Volvox colonies

Volvox colonies

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Caption: Volvox colonies. Light micrograph of two colonies of Volvox aureus, under Nomarski (differential interference contrast) illumination. Volvox has been variously classified as a green alga or as a flagellate protozoan. Each colony is a large hollow sphere made up of thousands of cells. The cells are arranged in a single layer at the surface of the sphere and are connected by fine cytoplasmic threads. Each cell has two flagella which point outwards and enable the colony to swim in its freshwater environment. Daughter colonies (dense green areas) are produced asexually by splitting within the colony. Magnification: x80 when printed 10cm high.

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Keywords: algae, animal, botanical, botany, chlorophyte, colonies, colony, contrast, couple, dic, differential interference, flagellate, freshwater flagellate, green alga, invertebrate, invertebrates, light micrograph, micro-organism, micro-organisms, microbe, microbes, microbiological, microbiology, microscopic, microscopy, nature, nomarski illumination, pair, protozoa, protozoan, sphere, spherical, two, volvox aureus, wildlife, zoology

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