BIOMOLECULES AND ENZYMES

Detailed explanation-1: -Answer and Explanation: Dolphins are mammals, one of the classes of vertebrates that also includes fish, birds, reptiles, and amphibians. Dolphins are sea-dwelling animals closely related to whales. Like other mammals, they are warm-blooded.

Detailed explanation-2: -Dolphins are part of the mammalian order Cetacea, which contains about 90 species of whales, dolphins and porpoises. Of these, the gigantic blue whale is the largest and the freshwater or river dolphin the smallest.

Detailed explanation-3: -Yes, dolphins are vertebrates, as are all Cetaceans. The largest species of dolphin is the orca, whose scientific name is Orcinus orca. All dolphin species have large brains, and they are among the most intelligent of all mammals.

Detailed explanation-4: -Mammals include humans and all other animals that are warm-blooded vertebrates (vertebrates have backbones) with hair. They feed their young with milk and have a more well-developed brain than other types of animals.