What is the significance of vestigial structures in evolutionary biology?
1
They are evidence of evolution because they are remnants of structures that served a function in an ancestral species but are no longer functional in a descendant species.
2
They are evidence against evolution because they suggest that organisms were not designed optimally.
3
They have no significance in evolutionary biology.
4
They are evidence of evolution because they suggest that organisms are constantly changing and adapting to their environments.