There are two types of animals, but three species of monotremes. They are the platypus, the short-beaked echidna and the long-beaked echidna.
Monotremes, marsupials, and placentals
Most mammals are placental...marsupial mammals and monotremes are not placental.
The platypus and the echidna are the only living examples of monotremes, or egg-laying mammals.
All mammals except for monotremes are viviparous. Monotremes are platypuses and echidnas: therefore, any mammal that is not a platypus or echidna is viviparous. Actual examples would be cats, dogs, horses, kangaroos, koalas, gerbils, gophers, beavers, dolphins, whales, rats, shrews, porcupines, armadillos, etc.
Yes, monotremes are real.
No a Blue Whale is Not a monotremes.
No. The koala is an example of a marsupial. The only two examples of monotremes, or egg-laying mammals, are the platypus and te echidna.
Monotremes never eat their young.
Monotremes are egg laying mammals, the platypus and the echidna are the only two monotremes.
Monotremes are mammals; therefore they have lungs, not gills.
Eutherians and monotremes are in the phylum Chordata.
No, monotremes do not have short internal development.