This worm is a well-studied model organism for developmental biology, systems biology, and genetics.
Caenorhabditis elegans, a free-living soil nematode, is widely used as a model organism. It is transparent, and consists of 959 somatic cells. This easily cultured worm provides a model for complex organ systems, as well as developmental biology and genetics. Caenorhabditis eleganswas the first multicellular eukaryotic genome to be completely sequenced.The Caenorhabditis elegans nuclear genome is approximately 100 Mb, distributed among six chromosomes.