Scientists notice structural similarities between fossils of a land animal and an aquatic organism. they know the similarities are not a result of the two organisms having to adapt to similar environments. what can they attribute the structural similarities to?

convergent evolution
common ancestry
transitional evolution
similar mating habits

The correct answer is common ancestry. Common ancestry is the explanation for species from completely different environments having similar features. For example: there is fossil evidence that whales are actually evolved from wolf-like animals due to fossil evidence of a transitional evolutionary stage (this is the fossil that can help provide evidence of this common ancestry) that shows a common ancestor between land mammals and whales.

The answer is c i just finished taking the test

It might. it might because if you think about if they discovered if we came from (lets say something funny like aliens) and thy found cells that matched and they would have t do more research about it but would most probably change their theory.