Science

Evolution of WhalesIntroductionSince historical time s organisms gradually undergo smorgasbord in all body aspects for example body sizing , shape , complexity of organs and slight changes in transmitted material . The changes are minor in a multiplication accumulate with the continuity of generations with the overall differences producing major changes . In closely cases a group of organisms a acclivity from a common solution for example whales , dolphins and porpoises evolved from mammals that lived on land for instance pakicetids and mesonychids . Whales are in any case thought to have a common ancestor with hippopotamus , deer and camels . Whale ancestors were terrestrial which as a leave alone of modification in the body parts and organs gave rise to the present day whales . There are many theories that rationalise the evolution of whales and the most embraced is that of whales evolving from small aquatic animals . The triumph of indwelling selection by Charles Darwin dictates that only the fit organisms survive .

This rule has applied to the evolution of whales since those that were unable to cope with competition became dead . Most of the ancestors of whales were obtained through fossil study (paleontological evidence ) of some(prenominal) terrestrial and aquatic organisms remnants excavated from Australia and Pakistan . Some of the examples of whale ancestors are sinonyx pakicetids , ambulocetids , rhodocetids , basilosaurus , dorudon , squalodon mammalodon colliveri , janjucetus hunderi and Harrison s whaleStatement on whalesWhales are the largest living mammals that inhabit aquatic environment Whales cannister dive to depths of about 3000 meters and have to go back...If you want to nonplus a full essay, order it on our website: Orderessay

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