Genetically what are the two types of twins that can be generated?

1

Explain the difference between amnion and chorion?

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

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

Which hormones are produced by placenta?

1

From which germ layer does coeloms originate?

1

Classify the animals based on the germ layers in their embryonic development?

1

How is the yolk sac formed?

1

What are the archenteron and the blastopore?

1

Name the three types of germ layers that form tissues and organs in animals?

1

Explain coeloms.

1

Nmae extra embryonic membranes layers in vertebrates?

1

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

1

Is there exchange of cells between the mother and the fetus through the placenta?

5

Define polyembryony?

1