Re: Ho do Euglena eat?

Dear Zach,

I assume that you know that some Euglena can make their own food by 
photosynthesis. However, these photosynthetic Euglena can survive without 
light if organic materials are available.

On the other hand, non-photosynthetic Euglena need another source for food. 
These organisms feed by means of phagocytosis (phago - 'feeding', 
cyto - 'cell'). Any particles that are too large to be absorbed by 
diffusion or active transport are taken up using this process.
The cell membrane of the Euglena invaginates to form a cup-shaped 
depression in which the food particle is contained. The depression is then 
pinched off from the cell membrane to form a food vacuole. The contents of 
the vacuole are digested and nutrients are then absorbed.

I hope this answer your question.