11 the liquid you add to
this too cold it won't activate. Why?

The yeast may not activate if it's way past it's expiration date. Next, add the required amount of yeast to the warm water. Feed the yeast! I like to add a little sugar or honey to the water and yeast mixture, then give it a stir.

not sure if this is what you'r looking for eubacteria and archaebacteria