I said earlier they evolve within their “kind.”
Which is exactly the phrase used by Fundamentalist Creationists. This phrase came about when Henry Morris, et.al. started writing multiple “Young Earth” books. It’s shocking to me how many Catholics have bought into this theory.
The idea of taking Genesis literally came from the Seventh Day Adventists and was made popular by Dr. Morris-- who by the way has a PhD in Civil Engineering-- not the best area of expertise to write a book on Evolution/Creation.
Personally, one of the many reasons I came back to the Church is because of their understanding that Science and the Bible do not contradict each other. Specifically, the intellectually bankrupt theories of young earth creationists is one of the factors that led me back. I’ve had to read a lot of material put out by the Institute for Creation Research and I’ve even visited their museum.
The Catechism quotes Dei Filius 4

S 3017;
Though faith is above reason, there can never be any real discrepancy between faith and reason. Since the same God who reveals mysteries and infuses faith has bestowed the light of reason on the human mind, God cannot deny himself, nor can truth ever contradict truth.
It has been my experience that those who insist on taking Genesis literally have not done any serious study on the subject other than reading material put out by the Young Earth Creationists. I think most people do this because it’s the path of least resistance. After all, the material they put out doesn’t require any serious analysis of actual science.
And it absolutely shocks me that some Catholics would rather take the opinions of Fundamentalist Young Earth Creationists over the Pope.
The Pope may not have a scientific background, however he does have a plethora of Priests who are substantially more scientifically and theologically qualified than any of the Young Earth Creationist advocates.
So… who do you want to trust? The Pope and his Army of Priests/Scientists or the Fundamentalists?
Here are two articles I found very helpful:
Darwinism, Fundamentalism and R.A. Torrey by Michael N. Keas
Adventist Origins of Young Earth Creationism by Karl Giberson