What is a body plan if there is no plan behind it? It is not a body but a blob, a formless plop of biological matter.
Like a skilled workman, the cell maintains “An array of tools, each one finely tuned.”
We looked at some papers claiming to see evolution happening in real time, to see if natural selection has actually invented a new function, or just broke an existing function.
Consider one of the simplest kinds of homeostasis — just one part of the regulation of sugar metabolism in E coli.