If a protein is found in humans,chimps,birds,fish,and tetrapods,in which did it most likely evolve?

Question

Quizplus · Accepted Answer

Given that the protein is found across a diverse range of species including humans, chimps, birds, fish, and tetrapods, it most likely evolved in an ancestor common to all these groups. Fish are the earliest evolutionary group among the options listed, suggesting that the protein first appeared in fish and was then inherited by all descendant groups, including tetrapods (which include birds, chimps, and humans).

If a Protein Is Found in Humans,chimps,birds,fish,and Tetrapods,in Which Did