Watching a cell develop reveals a lot about the history of that organism. Human embryo on the third week is a featureless disk of cells. On further growth, the primitive tree appears. This video explains the development of the embryo and it's significance to evolution.
Channels: Developmental Biology
Tags: What embryos tell about evolution
Uploaded by: chucky ( Send Message ) on 24-11-2010.
Duration: 3m 43s