Do all mammals have a placenta, Biology

Assignment Help:

Q. Do all mammals have a placenta?

Mammals of the monotreme group (platypus, echidnas) are oviparous egg- laying and they don't have a placenta. Mammals of the marsupial group (koalas, kangaroos, opossums) do not have a placenta either females of this group give birth to embryonic young that then continue development within the mother's pouch, placenta only forms in female placental mammals.


Related Discussions:- Do all mammals have a placenta

Explain repressors , Gene repressor proteins which inhibit the trans...

Gene repressor proteins which inhibit the transcription of particular genes in eukaryotes also exist. They may act by binding either to control parts within the promoter region nea

Define gas liquid chromatography, Define Gas liquid chromatography? Thi...

Define Gas liquid chromatography? This is used for separating and identifying volatile compounds of fatty acids, hydrocarbons, sterols, amino acids and lipids, even from nanogr

Explain the decolourizing agent - stain technique, Explain the Decolourizin...

Explain the Decolourizing Agent - Stain Technique? 95% ethanol is used as a decolourizing agent. It has two functions - (1) It acts as protein - dehydrating agent, and (2

What is the role of heart in human body, What is the role of heart in human...

What is the role of heart in human body? The heart is the main pump that circulates the blood and fluid within the body. The heart, beats at 72 times per minute, and pumps abou

What is coelom - body cavity explain, What is Coelom - Body Cavity explain?...

What is Coelom - Body Cavity explain? Among the bilaterally symmetrical organisms, animals have three different types of body plans with respect to body cavities. The term coel

Amine and the carboxyl groups, Q. Do the amine and the carboxyl groups atta...

Q. Do the amine and the carboxyl groups attached to central carbons participate in the union between amino acids? Yes. The nitrogen of the amine group of one amino acid binds t

Explain the development of sirs or mods, Explain the Development of SIRS or...

Explain the Development of SIRS or MODS? Multiple hypothesis have been proposed to explain the development of SIRS or MODS. The progression of SIRS to MODS appears to be mediat

Explain the drawback of protein hydrolysates, Explain the drawback of prote...

Explain the drawback of protein hydrolysates The drawback of many protein hydrolysates, is that when hydrolysed, most of the food proteins liberate bitter  tasting peptides, wh

#title.zoology., #question.why obelia is considered of special interest in ...

#question.why obelia is considered of special interest in zoology.

Explain interaction of pyridoxine with carbohydrates, Explain Interaction o...

Explain Interaction of pyridoxine with Carbohydrates? Pyridoxine is involved in glyconeogenesis through its action in transaminase reactions. Low levels of pyridoxine impair gl

Write Your Message!

Captcha
Free Assignment Quote

Assured A++ Grade

Get guaranteed satisfaction & time on delivery in every assignment order you paid with us! We ensure premium quality solution document along with free turntin report!

All rights reserved! Copyrights ©2019-2020 ExpertsMind IT Educational Pvt Ltd