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

Design a controlled experiment, Design a controlled experiment to test the ...

Design a controlled experiment to test the hypothesis that acid precipitate inhibits the growth of elodea, a common freshwater plant.

Vascular tissues, VASCULA R TISSUES (= FLUID TISSUES) - The vascula...

VASCULA R TISSUES (= FLUID TISSUES) - The vascular tissues are of two types: blood and lymph.

Determine the cylindrical body of nematodes brought, Compared to platyhelmi...

Compared to platyhelminthes which physiological problem have the cylindrical body of nematodes brought? How was that problem solved? The cylindrical shape of nematodes made imp

Photosynthesis, how does the green plant build up carbohydrates

how does the green plant build up carbohydrates

Enzyme vocabulary, what is a limited resourse needed by all cells?

what is a limited resourse needed by all cells?

Metamerism or segmentation, Metamerism oe Segmentation In the early c...

Metamerism oe Segmentation In the early coelomates the coelom was not divided into segments, the whole body cavity was a single space. Hence body movements were not precise.

45, What grade did you get in biology?

What grade did you get in biology?

What are fitness tests, What are Fitness Tests? Testing is an important...

What are Fitness Tests? Testing is an important evaluation tool for the sports performer as it gives them an insight into their current physical condition and the effectiveness

What are examples of the ecological and economic, What are examples of the ...

What are examples of the ecological and economic importance of molluscs? Molluscs are significant players in several food chains in ecosystems. Many marine molluscs are part of

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