Development
Development is the process of temporal and spatial control of gene expression that gives rise to a fully functional adult form of the organism. Studies of development in C. elegans have traced every cell from birth to final differentiated state in the developing nematode. These studies have elucidated cellular, genetic, and molecular mechanisms that control the division, growth, differentiation and morphogenesis of cells giving rise to tissues and organs in the nematode body. While most terminally differentiated cells can be traced by lineage back to a founder cell, there still remains a few cells types in the nematode with stochastic identity, relying on signals from the environment for their final identity.