Question

Both euglena and Cyanobacteria are photosynthetic unicellular organisms found in pond water. The feature that distinguishes euglena from Cyanobacteria is the-
A. Ability to maintain homeostasis

B.presence of ribosomes

C.presence of nuclear membrane

Answer 1

The correct answer is option C, that is, the presence of the nuclear membrane.  

Cyanobacteria is a phylum of bacteria that attain their energy via the process of photosynthesis, and are the only photosynthetic prokaryotes possessing the tendency to generate oxygen. As a prokaryote, they are devoid of the nuclear membrane.  

Euglena refers to a single cell flagellate eukaryote. It comes under the class Euglenoidea. The species of Euglena are witnessed in salt water and in freshwater. Being a eukaryote, they possess nuclear membrane.  

Answer 2

The feature that distinguishes euglena from cyanobacteria is the presence of a nuclear membrane, because only eukaryotes have nuclei.