Short notes on eutheria
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Eutheria (Placentalia) An infraclass of mammals in which the embryos are retained in a uterus in the mother's body and nourished by a placenta. The young are thus fully protected during their embryonic development and kept at a constant temperature. Placental mammals evolved during the Cretaceous period (about 100 million years ago). Modern placentals are a highly diverse group that occupy all types of habitat in all parts of the world. They include the orders Artiodactyla, Carnivora, Cetacea, Chiroptera, Insectivora, Perissodactyla, Primates, Proboscidea, and Rodentia. Compare Metatheria; Prototheria...
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