Morphological and Molecular Evidence
Orca: largest member of the dolphin family, live about 50-80 years in the wild, found in cold and costal waters, eats marine mammals, fish, seabirds and sharks
Whale: most common relative to dolphins, very large, stay in groups, very good parents to offspring animals
This is a graph like picture of the whole dolphin family and what mammals are like dolphins.
Orcas have 75% similarities to bottlenose dolphins and whales have about a 25% similarity to bottlenose dolphins.
Morphological and molecular evidence shows evidence for evolution of bottlenose dolphins because it shows how other mammals that we wouldn't think would be related to dolphins, actually are. It also helps explain and prove that orcas and dolphins could somehow mate.
Birds: a bird's wings are the same as a dolphins flippers because they use them the same way
Humans: we have a similar brain compared to dolphins and also the arms, our arms move the same way as a dolphin uses it's flippers
This is a homologous structure of animals that are similar to dolphins because of the bones that they have.
Homologous structures are comparing animals that have similar features.