The embryo in a placental mammal is fully developed within the mother's uterus, sustained by the placenta, through which it receives all the nutrition it needs. Its organs are fully developed and it is able to survive outside the mother's body once it is born. It requires mothers' milk (or a suitable substitute) when it is born, but it can live independently of the mother, given the right care.
Baby marsupials are born extremely undeveloped, and are unable to survive at all outside the mother's body, until they can reach the pouch. They are born after a much shorter gestation period than a placental of equivalent size, and even the largest species of marsupial is only the size of a jellybean when it is born. After birth, it must climb up the outer fur of the mother and into the pouch where it attaches itself to a nipple. The teat swells in the joey's mouth, securing it in place so it cannot be accidentally dislodged. The joey will usually stay in the pouch for about 6-9 months, depending on the species, until it is developed enough to leave the pouch and move about independently.
It does not take as long for the process to be complete in the marsupials as it does for the eutharians.
Theria is the closest connection between marsupials and placentals. It includes all mammals besides the monotremes.
Kangaroos are Marsupials and Camels aren't
difference
placenta which is between the mother and the embryo.
different between agricultural development and industrial development
what is the difference between Indian and Japanese population cnsus what is the difference between the development of the constitution of India and japan? what is the difference between the development of the constitution of India and japan? what is the difference between the development of the constitution of India and japan?
the difference between sequence of development and rate of development and why is the difference important. speed at which development happen. The difference is important because speed does not necessarily have to do with the sequence also it's important to recognize the difference so you can identify where children need help or at risk.
Well.... The difference is purely the names. They are completely identical.
what is the difference beetween social work and community development
Growth is visible but development is not visible
Growth is visible but development is not visible
The difference between training and management development is that training is generally conducted to teach essential skills that are work related. Management development is designed to encourage skills that are used in personal development and business management.Ê