Compare a duck billed platypus and a human—what are three characteristics we share and what are two we do not?
The platypus is an interesting choice for comparison to a human, because the platypus is a good example of nature defying our methods of categorizing life.
The platypus and humans are both mammals. The most fundamental definition of this name is that the organism is a warm-blooded vertebrate, gives birth to live young, feeds its young with milk expressed from the mother's body, and is capable of growing body hair or fur.
Humans and the platypus share...
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