MICROANATOMY

Detailed explanation-1: -The monotremes are a group of highly specialised egg-laying predatory mammals, containing the platypus and echidnas . There are only five living species of monotreme, contained within two families: Family Ornithorhynchidae: the platypus, a single species in a single genus, Ornithorhynchus anatinus.

Detailed explanation-2: -Mammals are a diverse group, but all mammals-There are 17 orders of terrestrial (land) mammals in Australia.; made up of 4 groups-monotremes, marsupials, rodents and bat.

Detailed explanation-3: -Mammals can be divided into three more groups based on how their babies develop. These three groups are monotremes, marsupials, and the largest group, placental mammals. Monotremes are mammals that lay eggs. The only monotremes that are alive today are the spiny anteater, or echidna, and the platypus.