Volvox


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Volvox

 

a genus of mobile colonial Chlorophyta (green algae) living in stagnant fresh waters. In the USSR there are four species. Volvox has the shape of a sphere measuring up to 3 mm in diameter; on the periphery of the sphere there is a single layer of from 200 to 50,000 cells, which are connected by protoplasmic threads: the cavity is filled with a liquid mucus. Two flagella extend outward from each cell; their movement propels the organism. A few larger cells serve for asexual and sexual reproduction; the sexual process is oogamy.

References in periodicals archive ?
Sperm packets released by male Volvox may find their targets more quickly because of the dancers' proximity.
Moreover, the flagella of Volvox are nearly identical to the cilia in the human body, whose coordinated action is central to many processes in embryonic development, reproduction, and the respiratory system.
The company invested more than 200 million guilders in the construction of two new trailing suction hopper dredgers, the Volvox Terranova (20,000 m3) and the Volvox Atalanta (4,500 m3).
The cash was raised with a national charity quiz run by financial business Lloyds TSB Development Capital and backed by car parts supplier Volvox, part of Leeds-based Ring Automotive.