First, all the patterns we observe in nature point towards a nearly four billion year long history of evolution of life on earth. Putting a fancy word on it, this is Consilience. Second, the anatomy and biochemistry of organisms is filled with quirky features, things that only make sense as artifacts of history. Again, putting a fancy term on it this is Dissonance. The canonical example of quirky artifacts of history is the Panda's thumb .
All biological systems are full of similar examples.
My favorite is in the asymmetries of snail anatomy . Even Lamarck understood the concept of contingent history. Biological systems often appear well designed. For example, eyes are very precise effective optical systems. Perfect design wipes clean the slate of history.