Research team headed by Prof Brian Leander of the University of British Columbia’s Departments of Botany and Zoology showed that single-celled organisms called warnowiid dinoflagellates evolved a tiny version of a multi-cellular eye, possibly to help see their prey better.
http://www.sci-news.com/biology/science-warnowiid-dinoflagellate-plankton-eyes-02973.html
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