The nematode worm
) is a very small worm, verging on the microscopic
in length). Developmental biologist
s (among other biologist
s) love it because all adult
s have the same number
), and it develops in a simple fixed order. It also has a very simple nerve system
, which is fully understood.
In December 1998, C. elegans became the first multicellular organism to have its genome completely sequenced (by the UK's Sanger Centre); see: C. elegans: Sequence to Biology, Science Dec 11 1998 (entire issue).