Final answer:
Euglena and Paramecium can be differentiated by examining their locomotion structures, presence of an 'eyespot', ability to photosynthesize, and outer covering.
Step-by-step explanation:
Euglena and Paramecium are both unicellular organisms, but they have distinct characteristics that allow for differentiation. One way to tell the difference is by looking at their locomotion structures. Euglena uses two flagella, one long and one short, to move around, while Paramecium uses hair-like structures called cilia.
Another distinguishing feature is the presence of a red 'eyespot' in Euglena, which helps it detect light. Additionally, Euglena can undergo photosynthesis if light is available, as it has a chloroplast, whereas Paramecium does not have the ability to photosynthesize.
Lastly, the outer covering of the cells is different. Euglena has a flexible protein-based structure called a pellicle, which provides shape and flexibility, while Paramecium is covered in rows, tufts, or spirals of tiny cilia, which are used for coordinated movements.