Euglenas are unicellular organisms. They are both self- feeders (autotrophs) and other-feeders (heterotrophs).
Which statement summarizes the heterotrophic activities of euglenas?
O A. They carry out photosynthesis in sunny places.
B. They are colorless and feed on other, smaller cells.
C. They live in water and have tail-like structures.
OD. They contain chloroplasts with chlorophyll.