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.
Using illustrations of invertebrate nervous systems how can the procedure of evolutionary cephalization be explained?
How respiratory system of the insects (with its independence between circulation and respiration) related to motor agility of some species of this arthropod class?
Name the fruiting bodies existed in some fungi?
Scope of Management Areas where principles of management can be
What is meant by the term proteomics? And also describe the term transgenic organisms?
Explain how do respiratory pigments act?
Photosynthesis is the most significant producer of molecular oxygen (O2) on our earth. Name the molecule from which oxygen atoms discharged by photosynthesis come? From which other molecule could one suspect they have come? Write the destin
What are the main causes of Typhoid?
What do you mean by hemoglobin? Name the inorganic element which is basic in the composition of hemoglobin?
In common which stage of the cell cycle has longer duration?
18,76,764
1956462 Asked
3,689
Active Tutors
1457099
Questions Answered
Start Excelling in your courses, Ask an Expert and get answers for your homework and assignments!!