What is placenta?
What are the endocrine functions of the placenta?
Explain monozygotic and dizygotic twins?
To which structures do coeloms give birth?
Are the extra embryonic membranes the same in all vertebrates?
After the morula stage what is the next stage?
What is the morphological feature that defines that stage?
What is yolk sac?
Define polyembryony?
How is the yolk sac formed?
Explain notochord?
What is polyembryony?
How during gastrulation are the first two germ layers formed?
How is the notochord structure formed?
What are the archenteron and the blastopore?