Sponges on ancient ocean floors 100 million years before Cambrian period

[swamidass (S. Joshua Swamidass)]

@Agauger

This is important because the topic is the kinds of information required to create different phyla. Transcription factors are not enough.

@evograd is. I know more than I should about this too. Transcription factor guided control is a big part of how development is encoded. It is not everything, but it certainly is a lot.