Sean Carroll in Preposterous Universe:
Evolution is sometimes described — not precisely, but with some justification — as being about the “survival of the fittest.” But that idea doesn’t work unless there is some way for one generation to pass down information about how best to survive. We now know that such information is passed down in a variety of ways: through our inherited genome, through epigenetic factors, and of course through cultural transmission. Chris Adami suggests that we update Dobzhansky’s maxim “Nothing in biology makes sense except in the light of evolution” to “… except in the light of information.” We talk about information theory as a subject in its own right, and how it helps us to understand organisms, evolution, and the origin of life.
More here.