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Duck-billed platypuses are one of five kinds of monotremes.

Kyle Mckinney

in Social studies

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William Cain on June 20, 2018

The answer is true. Monotremes are one of the three groups of mammals, along with placentals and marsupials. They are characterized by the laying of the eggs instead of having live birth, and by their structural differences. There are only five types that are the platypus and four species of echnida, or spiny anteater.


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