This is where the interpretation of the evidence comes in. Darwinists see it as evidence of common descent. Creationists see it as evidence of common deign.
It only stands to reason that creatures sharing the same environment and food would be created using the same materials in much the same patterns.
One design; common descent.
This is called Occam's razor. The simplest hypothesis is assumed to be the correct one.
The reason the simplest hypothesis is assumed to be the correct one is that more complicated hypotheses have more opportunity to run into a mode of failure. In a Rube Goldberg contraption, what happens if the cat wakes up before the spoon taps it?
Life only has to begin, and find a niche where it can survive. Then it will go forth and replenish the land.
You still need a Creator, but you don't have to stick Him in a sweat-shop cranking out almost-duplicates for eons.
He can push the button and take the rest of the day off.
“Creationists see it as evidence of common deign. “
If we are designed by a perfect being why is the design so imperfect?