SSC MTS EXAM

Detailed explanation-1: -Euglena can also gain nutrients by absorbing them across their cell membrane, hence they become heterotrophic when light is not available, and when they cannot photosynthesize. It is because of this they are also called mixotrophs.

Detailed explanation-2: -Euglena’s nutrition is photoautotrophic. In the absence of light, it can obtain nutrition from dead and decaying organic matter in the substrate by secreting digestive enzymes (saprophytic feeding). Euglena lacks this dual mode of nourishment. Some are holozoic (Peranema) and others are saprobic (Rhabdomonas).

Detailed explanation-3: -Euglena is a unicellular organism that feeds on bacteria and uses CO2 as a carbon source.