Not blustering.
Step one we begin with a eukaryotic cell. Such cells begin to stick together in colonies. There are a handful of cell surface proteins that can do this.
Step 2. Some of the stuck together cells begin to specialize - this is the beginning of an organism rather than a collection of cells.
"Cut a hydra in two, and you will end up with two hydras. Cut it into 20 pieces and you will have 20 hydras. Turn the hydra inside-out, and it will recover. Scientists have even blended hydras down to their cellular components, spun them in a centrifuge so they pack together, and watched as the cells sort themselves back into hydra."
Hydra: Stretchy, Speedy, & Probably Immortal | |