I would like to know what field of biology focuses on the science of
primitive multi-cellular life forms. Specifically, the stage at which
cells were cooperatively binding, specializing, and competing for
resources, but prior to their collective reproduction as a species.
Further, would this same field also delve into the details of
reproductive technology evolution. I am interested in learning about
the very earliest multi-cellular biological stages leading toward
species specific reproduction. In other words, the primitive societies
of cellular life traceable in time to their successful destiny as mature
Also, can anyone recommend a good book or reference on this subject?