Let’s have a look at an example: nerve cells and their action potential signals.
In a word, they are unresponsive.
Amoebas contain hundreds of times more DNA than humans, and this “just didn’t make sense.”
As in all other disciplines within the life sciences, embryonic development is not complying with evolutionary theory.
Given its widespread popularity and acceptance you might not have realized that the so-called RNA World hypothesis suffers from some dramatic problems.