What is coelom? Are all animals coelomate?

1

Which hormones are produced by placenta? What is their significance?

1

What is the cell division during the first stage of the embryonic development called?

1

From which germ layer do the liver and the pancreas originate? What are other organs and tissues made from that germ layer?

1

Explain gastrulation?

1

Define polyembryony?

1

What organogenesis?

1

What is gastrulation? How during gastrulation are the &rst two germ layers formed? Which are these germ layers?

1

What are the archenteron?

1

Explain gastrulation? What stage follows gastrulation?

1

What is the chorioallantois membrane present in the embryonic development of reptiles and birds?

1

What are pericardium?

1

How is the mesoderm of triploblastic animals formed?

1

Which is the extra embryonic membrane whose function is to store nitrogen wastes of the embryo? Is this function present in placental mammalian embryos?

5

When are archenteron and blastopore formed?

1