Mast, S. O., Light and the Behavior of Organisms, 109 (Wiley, New York, 1911).
The structure of Euglena granulata and Chlamydomonas eugametos has been studied using polarization and electron microscopy, cinematography, and chemical extraction procedures, with the main focus on ...
Utilizing Euglena's negative phototaxis, the tendency to move away from blue light, to control their position within a red spot.