As I said before the story of flood it is a copy of Gilgamesh Epic, that is older than the Jewish Scriptures. There are many interesting things that when you start to search it will lead to conclusions.
For instance ancient societies used to be Matriarchal. In fact the Israelites used to worship Asherah godess along with Yaweh and she was god's wife, then males became dominant and removed Asherah from the scene.
So Noah or Gilgamesh, couldn't have a dino at the ark since they are all vanished 65 million years ago when a huge comet hit the Earth and vanished them within few years. That's when mamals survived and from them we evolved.