What animals belong to the unicellular subkingdom? What are their common features?

The sub-kingdom of the Unicellular includes animals, another name for which is Protozoa. These are amoebas, ciliates, euglena and others, which consist of one cell. But, at the same time, this cell shows all the signs of the body. By the way they feed, they are heterotrophs, that is, they use ready-made organic substances that are digested in the digestive vacuoles. They breathe oxygen dissolved in water, excrete harmful liquid products through the contractile vacuole, multiply by cell division, and transfer unfavorable conditions in the form of a cyst.



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