Subclass Zoomastigina, also known as flagellates, are unicellular organisms that possess whip-like structures called flagella. The term Zoomastigina comes from the Greek word "zoon" meaning animal, and "mastix" meaning whip. These organisms are found in a variety of habitats, from freshwater to soil to the digestive tracts of animals. Synonyms for the term Subclass Zoomastigina include: 1. Flagellates 2. Mastigophorans 3. Zooflagellates 4. Protozoa 5. Heterotrophic flagellates These synonyms help to describe the characteristics and behaviors of this diverse group of unicellular organisms. Flagellates, for example, are distinguished by their whip-like flagella, which they use for movement and feeding.