How does the embryo turn from gastrula into neurula? How is the neural tube formed? What is the embryonic origin of the nervous system in vertebrates?

5

Which cells are produced in the first stage of embryonic development?

1

From which germ layer does coeloms originate?

1

In which type of animals does the placenta exist? What is its main function?

5

How is the yolk sac formed?

1

Explain peritoneum?

1

What is the function of the vitellus in the vertebrate egg?

1

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

1

What are the animal pole and the vegetal pole of the vertebrate egg?

5

What is yolk sac? How is it formed?

1

Explain monozygotic and dizygotic twins?

1

From which germ layer do the epidermis and the nervous system originate?

1

Explain blastopore?

1

What is the significance of placenta?

1

Explain pleura?

1