Why are Dolphins and porpoises are closely related species. Name three ways that you would be able to find evidence for this?

Dolphins and porpoises are closely related species because they both belong to the order Cetacea and share a common ancestor, which places them in the suborder Odontoceti (toothed whales). To find evidence for their close relationship, one could analyze their genetic similarities through DNA sequencing, study their anatomical features such as skull structure and teeth, and examine their behaviors and social structures for commonalities. Additionally, fossil records can provide insights into their evolutionary lineage and divergence.