John Updike

John Updike Evolution of Sirenia Many scientists believe that sirenians evolved wet to fifty-five million years ago from sm only foot animals. The closests living relatives today are elephants and small Asiatic mammals called hyraxes. Although in that respect are vast differences between elephants, hyraxes, and sirenians, fossil march shows that all three evolved from a common ancestor. The manatees corporal characteristics are visible remnants of their ancient heritage. The dugongs tusks are another link to elephants. Like elephants, sirenians are awful animals.

thither are fiv e species of Sirenia, but scientists theorize that there were numerous more in the past. Early forms of manatees are thought to cast originated near the Amazon basin in southernmost America. about remained there to become the Amazonian manatee, while others migrated up by means of the Caribbean, magnanimous rise to the Antillean and Florida manatees. Another group managed to swim or where carried on currents acro...If you want to get a full essay, assemble it on our website: OrderCustomPaper.com

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