Volvox colonies

Volvox colonies

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Credit: SINCLAIR STAMMERS/SCIENCE PHOTO LIBRARY

Caption: Volvox colonies. Light micrograph of colonies of Volvox aureus, under phase 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, flagellate, freshwater flagellate, green alga, invertebrate, invertebrates, light micrograph, micro-organism, micro-organisms, microbe, microbes, microbiological, microbiology, microscopic, microscopy, nature, phase contrast illumination, protozoa, protozoan, sphere, spherical, volvox aureus, wildlife, zoology

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