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

How is striped pattern of the striated muscle cells formed, How is the stri...

How is the striped pattern of the striated muscle cells formed? The functional units of the muscle fibers are the sarcomeres. Within the sarcomeres blocks of myosin and actin

What are some significant neurotransmitters?, What are some significant neu...

What are some significant neurotransmitters? The following are some neurotransmitters: adrenaline (epinephrine), noradrenaline (norepinephrine), dopamine, acetylcholine, seroto

Functional significance of this structural difference, The vertebral bodies...

The vertebral bodies are much larger in the lower back than the neck. What is the functional significance of this structural difference?

Which is an isotope of pgisphorous, The most abundant from of phosphorous h...

The most abundant from of phosphorous has 15 protos, 16 neutrons and 15 electrons. Which of the following is an isotope of pgisphorous? (make all correct choices) A. an atom wit

Embryo and endosperm, What is the difference between embryo and endosperm?

What is the difference between embryo and endosperm?

Zoology, right classification of protozoa up to class

right classification of protozoa up to class

Define nutritional support management for pancreatic cancer, Define Nutriti...

Define Nutritional Support Management for pancreatic cancer? When there is deficiency of exocrine pancreatic secretions, adequate amounts of pancreatic extract are helpful. It

Define inadequate calcium intake and iron deficiency anaemia, Determine Eff...

Determine Effect of Inadequate calcium intake and iron deficiency anaemia? The requirement of iron and calcium is at its peak in adolescence due to an increase in the skeletal

What is the climax stage of an ecological succession, Q. What is the climax...

Q. What is the climax stage of an ecological succession? The climax stage is the stage of an ecological succession in which the community of an ecosystem turn into stable and d

Etiology and clinical features - neurological disorder, Define Etiology and...

Define Etiology and Clinical Features that causes neurological disorder? The cause of this neurological disorder can be mechanical or paralytic. The mechanical cause is primari

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