What are the blastopore?

1

When are archenteron and blastopore formed?

1

What are the archenteron and the blastopore? What is the stage of the embryonic development in which these structures are formed?

1

Explain gastrulation?

1

What is the function of the vitellus in the vertebrate egg? How are these eggs classified according to the amount of vitellus within them?

5

What are the four initial stages of the embryonic development?

5

What is polyembryony?

5

To which structures do coeloms give birth? Are all animals coelomate?

1

What is the function of the yolk sac?

1

To which structures do coeloms give birth?

1

What is the morphological feature that defines that stage?

1

Explain foetal pole?

1

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

5

How is the yolk sac formed?

1

What are other organs and tissues made from that germ layer?

1