👉 In biology, an "eflagelliferous" refers to a type of organism that has a flagellum (a pair of arms on its surface) but lacks a nucleus. This is often seen in marine organisms like jellyfish and cnidarians, as well as some animals with a simple circulatory system. These eflagellifers are characterized by their unique body structure, which includes a single cell that contains the flagellum. However, unlike other eukaryotic cells,