What are eyespots? Evolution of eyes – Biology

By |2019-06-03T15:52:30-07:00May 28th, 2017|Biology|

Euglena have red eyespots (thanks to Sharon Mooney) When did cells learn to see? About two billion years ago, or maybe a little later, some eukaryote cells developed the ability to see. That was during the Proterozoic period, not long after the first cells evolved. Sight was one of the first things that [...]