4. Manatees are one example of a sea mammal.in the order Sirenia. According to t

Question

4. Manatees are one example of a sea mammal.in the order Sirenia. According to the tree, which orders represent their closest mammalian relatives? Find the common names of one example species from each group. (If you need to, look up the Orders in Wikipedia to answer this question.) 5. Are the species found in these orders aquatic, like the order Sirenia? NO 6. When did Sirenian sea mammals diverge from their closest evolutionary relatives? o mya 7. Who are Cetartiodactylan sea mammals (ex: dolphins) 3 closest mammalian relatives? horses ,vhi te taidl duur,sheup 8. Are they aquatic? (If you need to, look up the Order in Wikipedia to answer this question) No 9. When did Cetartiodactylan sea mammals diverge from their closest mammalian relative? 6 mya 10. Are Cetartiodactylan and Sirenian sea mammals closely related to each other? 11. What does the phylogeny of the Sirenia and Cetartiodactyla indicate about the origins of the trait of land mammals adapting to aquatic habitats? 12. Which group of mammals has evolved most recently? Give a common-name example (use Wikipedia) morso pious 13. In which part of the world do they live? What is a bit unique about that part of the world? Australia 4-2-11

Explanation / Answer

1) Sirenia is an order belonging to the clade Tethytheria and superorder Afrotheria. Sirenia is closely related to the order Proboscidea. The order Proboscidea consists of the family Elephantidae and genus Loxodonta and Elephas. Loxodonta are commonly known as African elephants and Elephas are commonly known as Asiatic elephants.

The order Sirenia consists of two families - Dugongidae and Trichidae. The species Dugong dugong commonly known as dugong belongs to this family. Trichidae consists of the genus Tricheus, to which Manatee belongs.

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