monotreme. Definition noun (taxonomy) A subdivision of the class Mammalia characterized primarily by their fetus being carried in the uterus of the mother and nourished via a placenta until the time of birth Supplement The class Mammalia pertains to any of the endothermic vertebrates identifiable by the following characteristics: a neocortex, three middle ear bones, a.. Supplement. Definition of monotreme : any of an order (Monotremata) of egg-laying mammals comprising the platypuses and echidnas Examples of monotreme in a Sentence Recent Examples on the Web Content includes video, images, and questions designed to teach students about mammals, birds, primates, bears, reptiles, monotremes… Posts about Monotremes written by Ramakanta Biswal. Monotreme, any member of the egg-laying mammalian order Monotremata, which includes the amphibious platypus and the terrestrial echidnas of continental Australia, the Australian island state of Tasmania, and the island of New Guinea. It is the most ancient living order of mammals. While monotremes use an XX/XY system, unlike other mammals, monotremes have more than two sex chromosomes.

The group contains only the echidnas and the platypus Definition noun (taxonomy) A subdivision of the class Mammalia comprised of mammals laying eggs rather than giving birth to live young Supplement The class Mammalia pertains to any of the endothermic vertebrates identifiable by the following characteristics: a neocortex, three middle ear bones, a lower jaw made of a single bone, a hairy body covering,.. The group of marsupials consists of approximately 334 species including kangaroos , possums, koalas, and … The babies are not fully formed when they hatch — lacking hair, claws, and a sense of sight. Marsupials – Definition, Facts, Characteristics Marsupials refer to mammals that give birth to incompletely developed young who are typically carried in a pouch on the mother’s belly.

noun. 1999. ; Living mammals can be classified into three major classes: eutherians, monotremes, and metatherians. A mammal that lays eggs and has a single urogenital and digestive orifice.

Examples of monotreme in the following topics: Living Mammals. Monotreme is an order of mammals that includes platypuses and four species of echidna, all of which are egg -laying mammals. ( ˈmɒnəʊˌtriːm) n. (Animals) any mammal of the primitive order Monotremata, of Australia and New Guinea: egg-laying toothless animals with a single opening (cloaca) for the passage of eggs or sperm, faeces, and urine. Monotremes: At top, a mother platypus cares for her immature young. Monotremes are mammals that lay eggs rather than giving birth. Monotremes form their sister clade. The evolution of mammals has passed through many stages since the first appearance of their synapsid ancestors in the Pennsylvanian sub-period of the late Carboniferous period. Monotremes:At top, a mother platypus cares for her immatureyoung. Video shows what monotreme means. noun any mammal of the primitive order Monotremata, of Australia and New Guinea: egg-laying toothless animals with a single opening (cloaca) for the passage of eggs or sperm, faeces, and urine. Monotreme. Examples of monotremes are the platypus and the echidna.