Even though marsupial mammals give birth to live young, an eggshell forms briefly early in their development. This is evidence that a.marsupials share a common ancestor with some egg-laying species; b. marsupials are not really mammals; c. all animals arose from a common ancestor; d. marsupial mammals were separately created by God; e. the fossil record of marsupial mammals is incorrect

Video transcript

Hello everyone here We have a question that says cetaceans like dolphins exhibit hair on their foreheads as fetuses, which is eventually lost. Baby dolphins also have whiskers in utero but shed them after birth. These characteristics imply that a dolphins have evolved to become fish. This is not true fish do not have hair or whiskers. Be dolphins have the primitive traits of mammals. This is true mammals would have things like hair and whiskers. See, cetaceans are once part of mammals. They are still parts of mammals. D hairs are not part of dolphins. Original trait, hairs are part of dolphins. Original traits. So our answer here is B dolphins have the primitive traits of mammals. Thank you for watching. Bye.