
Prochloron (from the Greek pro (before) and the Greek chloros (green) ) is a unicellular oxygenic photosynthetic prokaryote commonly found as an extracellular symbiont on coral reefs, particularly in didemnid ascidians (sea squirts). Part of the phylum cyanobacteria, it was theorized (endosymbiotic theory) that Prochloron is a predecessor of the p...
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http://en.wikipedia.org/wiki/Prochloron

A genus of prochlorales containing unicellular, spherical bacteria without a mucilaginous sheath. They are found almost exclusively as extracellular symbionts of colonial ascidians on subtropical or tropical marine shores. ... (12 Dec 1998) ...
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http://www.encyclo.co.uk/local/20973

any spherical, photosynthetic, prokaryotic microorganism of the genus Prochloron, occurring in subtropical and tropical habitats in symbiosis with various invertebrates, esp. marine chordates, proposed as ancestral to the chloroplast of green algae and plants.
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https://www.infoplease.com/dictionary/prochloron
No exact match found.