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Volvox colonies, light microscopy

K005/4079

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Credit

WIM VAN EGMOND / SCIENCE PHOTO LIBRARY WIM VAN EGMOND / SCIENCE PHOTO LIBRARY

Caption

Volvox colonies. Microscope footage of Volvox sp. colonies. Volvox are small freshwater unicellular green algae that usually make up larger spherical colonies, which behave like a multicellular organisms. Individual cells are connected to each other via protoplasmic strands, and embedded in a globe of glycoprotein. Daughter colonies (small green spheres) are produced asexually inside each parent colony, which disintegrates to release them when they are mature. Colonies also reproduce sexually, in which case male and female gametes are produced and a sexual union occurs. Individual Volvox cells have two hair-like flagella that protrude outwards and are used for colony locomotion.

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