Answer:
Euglena is a genus of single cell flagellate eukaryotes.
Step-by-step explanation:
Most Euglena are considered mixotrophs: autotrophs in sunlight and heterotrophs in the dark. Euglena do not have plant cell walls, but have a pellicle instead. The pellicle is made of protein bands that spiral down the length of the Euglena and lie beneath the plasma membrane.