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Monotremes are the most primitive mammals. There are three species of monotremes, the duck-billed platypus (Ornithorhynchus) and two spiny anteaters, or echidnas (Tachyglossus and Zaglossus). These mammals lay eggs; after the babies hatch, the mothers nourish their young with milk. Today, monotremes live only in Australia and New Guinea. The name monotreme means "one-holed," referring to the cloaca, a single hole that serves the urinary tract, anus, and reproductive tract in monotremes.
The Duck-billed Platypus is a primitive mammal from Australia. Go to a platypus guiz or go to the answers.
Monotremes are primitive, egg-laying mammals. Spiny anteaters and the duck-billed platypus are monotremes.
Also called the echidna, this is a primitive, egg-laying mammal from Australia and New Guinea.
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