What is the meaning of monotreme? Meaning of monotreme. Quick definitions from WordNet (monotreme) noun: the most primitive mammals comprising the only extant members of the subclass Prototheria Also see monotremes Words similar to monotreme Usage examples for monotreme Popular adjectives describing monotreme *Response times vary by subject and question complexity. monotreme ... All definitions are approved by humans before publishing. [20], The monotremes also have extra bones in the shoulder girdle, including an interclavicle and coracoid, which are not found in other mammals. Monotreme Biology You are here. The only monotremes are the platypus and two species of echidna , all native to Australasia . 2. Monotremes are traditionally referred to as the mammalian subclass Prototheria. If a mammal gives birth to live animals, how is a monotreme a mammal if it lays eggs? [9] Tooth loss in modern monotremes might be related to their development of electrolocation.[10]. Information and translations of monotrème in the most comprehensive dictionary definitions resource on the web. All Rights Reserved. monotreme (plural monotremes) Ventral view of a female echidna, a monotreme , showing single orifice. How do you use monotreme in a sentence? What is the definition of monotreme? [5] The extant monotreme species are the platypus and four species of echidnas. The eggs are temporarily transferred to a pouch beneath the female's abdomen where they eventually hatch and are nourished by … A subclass of the Class Mammalia consisting of animals that lay eggs. Monotreme definition is - any of an order (Monotremata) of egg-laying mammals comprising the platypuses and echidnas. Cleavage divisions do not divide the embryo completely and result in an embryonic-abembryonic axis that corresponds to the future dorsoventral axis of the embryo. Know the details here to learn how the body sets the body temperat.. Double or twofold. What are synonyms for monotreme? n. Genetics A cell, organism, or group of organisms having a diploid number of chromosomes. Describes how monotremes reproduce. [34] However, a more recent study showed that REM sleep accounted for about 15% of sleep time observed on subjects at an environmental temperature of 25 °C (77 °F). Monotreme oocytes are an order of magnitude larger in diameter than those of other mammals and contain a large amount of yolk. The monotremes are typified by structural differences in their brains, jaws, digestive tract, reproductive tract, and other body parts compared to the more common mammalian types. GCSEs & IGCSEs This page was last edited on 16 February 2021, at 20:04. The Hidden Treasure of Fidelity Definition Biology When something like this happens, the nurse must inform the client which they cannot do it for ethical and legal explanations. There are three species of Long-beaked echidnas in New Guinea ( Zaglossus attenboroughi, Zaglossus bartoni and Zaglossus bruijni) Echidnas tongues are covered in sticky mucus that makes it easier for them to catch and snack on ants and termites, eating up to two kilograms in one meal. 2003 Dec;136(4):795-8. doi: 10.1016/s1095-6433(03)00281-2. [8][41], The traditional "theria hypothesis" states that the divergence of the monotreme lineage from the Metatheria (marsupial) and Eutheria (placental mammal) lineages happened prior to the divergence between marsupials and placental mammals, and this explains why monotremes retain a number of primitive traits presumed to have been present in the synapsid ancestors of later mammals, such as egg-laying. Cloaca Definition A cloaca is an orifice through which urine and feces are eliminated in birds, reptiles, amphibians, and a few branches of the mammal family tree. — English word, define in French — monotreme n. (Zoologie) Monotrème. More primitive kinds of mammals such as monotremes would generally have been expected to be outcompeted when more advanced mammals like the placentals evolved; but Australia became an island when it split away from what is now Antarctica millions of years ago. Word origin: Greek monos (one) + trema (hole, i.e. PMID: 14667844 DOI: 10.1016/s1095-6433(03)00281-2 No abstract available. Free learning resources for students covering all major areas of biology. At its broadest definition, biology covers the study of plant life, animal life, microbial life, and how these different lifeforms interact with each other and the systems around them.CellsCells are the basic building blocks of complex organisms.
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