sentence: Some species are single cells, some are multicellular.
sentences_before: The 'choanoflagellates' are a class or phylum of collared cells.
sentences_after: They are eukaryote flagellate cells of microscopic size. They do not have chloroplasts, and are heterotrophic. Carr M. 'et al.' 2008.
concept_name: specie
headings: Choanoflagellata
categories: Protista Invertebrates Minor phyla