WebMonotremes lack a placenta. Monotremes have poorly developed nipples. Monotremes are cold-blooded. Monotremes lay eggs. Monotremes are found only in New Guinea … WebMonotremes are an ancient group of mammals in the order Monotremata, ... the young lap milk from the mother's mammary glands, which lack a nipple. There are two families and three species of monotremes. The family Tachyglossidae includes two species: the spiny anteater, found in Australia, Tasmania, and southern New Guinea; and the long-nosed ...

Monotreme - Biology Encyclopedia - body, structure, produce, …

WebAnswer: Monotremes, such as the platypus and echidnas, do not have nipples like mammals do. Instead, they secrete milk from specialized glands on their skin, which the young lap up. This is thought to be an example of an evolutionary "throwback" to a more ancient form of lactation, before the evolution of nipples. During the course of evolution the monotremes have lost the gastric glands normally found in mammalian stomachs as an adaptation to their diet. Monotremes synthesize L-ascorbic acid only in the kidneys. Both the platypus and echidna species have spurs on their hind limbs. See more Monotremes are prototherian mammals of the order Monotremata. They are one of the three groups of living mammals, along with placentals (Eutheria), and marsupials (Metatheria). Monotremes are typified by structural … See more Monotremes are conventionally treated as comprising a single order Monotremata, though a recent classification proposes to divide them into the orders Platypoda (the platypus along with its fossil relatives) and Tachyglossa (the echidnas, or spiny anteaters). The … See more • Nowak, Ronald M. (1999). Walker's Mammals of the World (6th ed.). Baltimore, MD: Johns Hopkins University Press. ISBN 978-0-8018-5789-8. LCCN 98023686 See more Like other mammals, monotremes are endothermic with a high metabolic rate (though not as high as other mammals; see below); have hair on their bodies; produce See more Monotremes' metabolic rate is remarkably low by mammalian standards. The platypus has an average body temperature of about 31 °C (88 °F) rather than the averages of 35 °C (95 °F) for marsupials and 37 °C (99 °F) for placental mammals. Research suggests … See more The first Mesozoic monotreme to be discovered was the Cenomanian (100-96.6 ma) Steropodon galmani from Lightning Ridge, New South Wales. Biochemical and … See more • "Introduction to Monotremes". U.C. Museum of Peleontology. University of California – Berkeley. See more fiber content of mushrooms

CHAPTER 27 Flashcards Quizlet

WebJan 11, 2016 · On the other hand, male horses/ lack mammary glands and nipples and male mice do not develop nipples, making it impossible for them to lactate. ... Mammary glands do not fossilize well, so most of this question depends instead on extant animals within the mammalian clade ‐ monotremes, marsupials, eutherians ‐ which are replete … WebWhile male monotremes and eutherians possess mammary glands, male marsupials do not. Mammary glands likely are modified sebaceous or eccrine glands, but their evolutionary origin is not entirely clear. Figure 1. Bones of the mammalian inner ear are modified from bones of the jaw and skull. (credit: NCI) WebMar 9, 2024 · Monotremes have mammary glands but do not have nipples. Examples of monotremes include duck-billed platypus and echidna. Duck-billed Platypus Echidna Eutherians Eutherians are placental... derating mc cable