Do all mammals have a placenta, Biology

Assignment Help:

Do all mammals have a placenta?

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

 


Related Discussions:- Do all mammals have a placenta

Zoology, characteristics of class mamalias

characteristics of class mamalias

Movement of body parts, MOVEMENT OF BODY PARTS - Movement of appenda...

MOVEMENT OF BODY PARTS - Movement of appendages bring about locomotion. Perapodia, setae in Annelida, jointed legs in Arthropoda, flat foot in mollusca, tube feat in sta

What are the main sources of mercury pollution, Q. What are the environment...

Q. What are the environmental harms caused by mercury pollution? What are the main sources of mercury pollution? The Mercury is a metal that when present in the water of rivers

Dna replication at biochemical level, Although there is much talk in the ne...

Although there is much talk in the news about stem cell research, the public and policymakers need to understand how basic body cells work to transmit information and replicate to

Why in the preparation of a karyotype analysis, Why in the preparation of a...

Why in the preparation of a karyotype analysis is the use of a substance like colchicine interesting? The Colchicine is a substance that disallows the formation of microtubules

What is menu planning, What is Menu Planning? Any individual who carrie...

What is Menu Planning? Any individual who carries the responsibility of providing meals has to take decisions regarding what to serve, how much to serve, how much to spend, whe

Nutrition, what is the mode of nutrition in tape worm

what is the mode of nutrition in tape worm

What are the uses of construction of a retaining wall, What are the uses of...

What are the uses of construction of a retaining wall? The retaining wall is constructed whenever space requirement do not allow the natural slope to be formed for an excavatio

Endoplasm and ectoplasm, Normal 0 false false false EN-...

Normal 0 false false false EN-IN X-NONE X-NONE MicrosoftInternetExplorer4

Bovine viral diarrhoea, B o v i ne viral diarrhoea Bovine viral dia...

B o v i ne viral diarrhoea Bovine viral diarrhoea (BVD) and mucosal disease (MD) are clinically dissimilar disease syndrome yet have a common viral etiology. The acute dise

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