5 Tiny Protozoans and Algae
Paramecia: is a well-known genus of nonparasitic protozoans that can be cultivated easily in the laboratory.
Amoeba: are primarily identified by their unusual method of movement.These single-celled organisms can stretch their cell membranes in temporary extensions called pseudopodia.
Euglena: is a genus of more than 1,000 species found worldwide, many of which are commonly studied by biology classes.
Diatoms: There are about 16,000 species of diatom found in all the waters of Earth.
Volvox: is a genus of about 20 species of freshwater green algae found nearly worldwide.