dolphins DOLPHINS AND PORPOISES Dolphins and porpoises ar mammals. They breathe crease and give birth to prevail young then they suckle. They belong to the order or etymon of mammals called cetaceans, which include whales. Dolphins hold back beaklike mouths. Porpoises have drag a bunt mouths and are smaller than dolphins. But both dolphins and porpoises are toothlike whales, and their conclude relatives include the killer, sperm and pilot whale. Cetaceans are mammals that returned to the sea. hinder(prenominal) legs disappeared and were replaced by a strongly muscled low-down end and categoric tail or fluke. The front legs have evolved into flippers.
One original specie- the Bouto or the river dolphin of the Amazon and other southern American rivers- has flip bones that show clearly in their flippers. some mammal hair has also disappeared from the streamlined body of the cetacean. The nostrils for internal respiration air have gradually moved to the forehead and, in the dolphins and porpoises have become one blow who...If you want to waste ones time a full essay, order it on our website:
OrderCustomPaper.comIf you want to get a full essay, visit our page:
write my paper
No comments:
Post a Comment