Uniformitarians was concept borrowed from geology. How did Darwin apply it to biology?

Answer: Uniformitarianism, states that the geological processes that take place today would have taken place in the past and it will continue in future as well.

Darwin suggested that the the evolution takes place over a period of time. It takes time to change and this change takes time.

Both the laws states the same thing, that the geological processes and the process of evolution takes place over a period of time and does not takes place rapidly.

Sorry about the other person I reported her answer.