Molecular evidence suggests they do share a common ancestor with other animals. Scientists are studying colony formation and cell-to-cell communication in choanoflagellates in search of clues to the evolution of multicellularity. They are characterized by possession of a flagella that is surrounded by a collar.Ĭhoanoflagellates resemble sponge feeding cells (choanocytes). Many biologists feel that because of their similarity to certain cells found in sponges that Choanoflagellates, a group of protists that can be solitary or colonial, are the most likely group to have given rise to metazoans. Multicellular animals are called metazoans. Good summary of major aspects of biology Evolution of the eukaryotic cell was followed by diversification into many lineages including, modern protozoans, plants, fungi, and animals.
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