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

Describe the terms cellular location and the basic processes, Describe cell...

Describe cellular location and the basic processes of photosynthesis.

What is the basic need for bone grafting, What is the basic need for bone g...

What is the basic need for bone grafting The basic need for bone grafting includes situations like: 1. Implant site development- when the quantity of bone is deficient to s

Functions of kidney, FUNCTION S OF KIDNEY - 1.      Excretion of nitro...

FUNCTION S OF KIDNEY - 1.      Excretion of nitrogenous wastes. 2.      Maintenance of water balance or osmoregulation. 3.      Acid base balance or regulation of pH.

Indications for surgery-tricuspid valve disease, Indications for Surgery : ...

Indications for Surgery : Echocardiography or right heart catheterization can quantify tricuspid stenosis. It is categorized as Tricuspid valve repair is advised when ther

Explain beginning and the end of the third interphase period, Q. What are t...

Q. What are the events that mark the beginning and the end of the third interphase period? What happens in the cell in this period? The third interphase period is the G2, It be

Show chemical compound responsible for ozone layer depletion, Q. What are t...

Q. What are the main chemical compounds that destroy the ozone layer? The major chemical compounds that destroy the ozone layer are the CFCs, chlorofluorocarbons, or freons, su

Define the risk reduction in cardiovascular disease, Q. Define the Risk red...

Q. Define the Risk reduction in cardiovascular disease? Ans. Weight loss by caloric restriction diets has been shown to decrease plasma CRP levels. Additional data indicat

Extraembryonic membranes the same in all vertebrates, Are the extraembryoni...

Are the extraembryonic membranes the same in all vertebrates? The presence of each extraembryonic membrane varies according to the vertebrate class. In fishes and amphibians

How many grams of sodium dodecyl sulfate, How many grams of sodium dodecyl ...

How many grams of sodium dodecyl sulfate (mw = 288.37) would you dissolve in 80 mLs of water to make a 20% solution of SDS?

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