Do all mammals contain a placenta
Do all mammals contain a placenta?
Expert
Mammals of the monotreme group (that is, platypus and echidnas) are oviparous, egg-laying, and they do not encompass a placenta. Mammals of the marsupial group (that is, kangaroos, koalas and opossums) do not contain a placenta either; females of this group give birth to embryonic young that then carry on growth in the mother’s pouch. Placenta just forms in female placental mammals.
Homogenization: It is intensive blending of mutually associated substances or groups of mutually associated substances to form a constant of distinct insoluble phases (sometimes with the addition of surfactants) to receive an emulsion or suspension.
What is meant by the term Immune sera or anti sera? Briefly explain it.
In photosynthesis what is the path followed by the energy which are absorbed by plants?
Why are vaccines made of own disease agent or of the fragments of it?
Explain about the classes into which mollusc are divided? Provide some of the representing beings of each class?
Define the term chloroplasts? Describe the main function of chloroplasts?
Write down the destination of notochord in protochordates and in vertebrates?
How are bacteria categorized according to their requirement for oxygen?
Using the examples of the invertebrate nervous systems how can the procedure of evolutionary cephalization be explained?
To raise the strength of muscle work is the muscle contraction intensely raised?
18,76,764
1941978 Asked
3,689
Active Tutors
1457690
Questions Answered
Start Excelling in your courses, Ask an Expert and get answers for your homework and assignments!!