4. During the formation of the embryo sac a lobe develops from near its chalazal end, so that the sac consists of two distinct parts joined by a narrower portion. 5. Double fertilization of the usual ...

43, No. 8, Aug., 1916 The Development of the Embryo Sac and Em... The Development of the Embryo Sac and Embryo of Cooperia Drummondii This is the metadata section. Skip to content viewer section.

Here's the scoop on the various types of twins ... fertilized egg, or embryo. Depending on when that embryo splits, they might also share the same placenta and amniotic sac. They’re much less ...