A second group, the cellular slime molds, spend most of their lives as separate single-celled amoeboid protists, but upon the release of a chemical signal, the individual cells aggregate into a great swarm. Cellular slime molds are thus of great interest to cell and developmental biologists, because they provide a comparatively simple and easily manipulated system for understanding how cells interact to generate a multicellular organism. There are two groups of cellular slime molds, the Dictyostelida and the Acrasida, which may not be closely related to each other.
Emphasis mine.
Devilcrats(evolution pimps/whores)!
Go away!
Do you all wear gold chains---pierced ears--noses...tattoos??
. . . because they [slime molds] provide a comparatively simple and easily manipulated system for understanding how cells interact to generate a multicellular organism.
We can add another fascinatingly primitive multicellular, the green algae Volvox.