Multiple Choice Questions (MCQs)
The first segregation in mammalian cells within the inner cell mass results in the formation of the ________.
The peripheral ring of blastodem cells that have not shed their deep cells constitutes the ________.
The lateral lips of the blastopore comprise those cells that will become ________.
Between the area pellucida and the area opaca is a thin layer of cells called the ________.
In Tunicate the second Cleavage ________.
The original type of trophoblast cells constitute a layer called the ________.
Mother provides the fetus with nutrients and oxygen, and the fetus sends its waste products ________ into the maternal circulation.
The cells adjacent to the chorda-mesoderm, the paraxial mesoderm cells, are the presursors of the in ________ fish.
Tunicate gastrulation is characterized by the invagination of the endoderm, the involution of the mesoderm, and the epiboly of the ________.
In mammalian cleavage at 64-cell stage, the inner cell mass and the ________ cells have become separate cell layers, neither contributing cells to the other group.
Fishes, ________, and birds undergo discoidal meroblastic cleavage, wherein the early cell division do not cut through the yolk of the egg.
Chorion is derived from ________ cells.
The cytotrophoblast initially adheres to the ________ through a series of adhesion molecules.
discoidal meroblastic cleavage occur in ________.
During mammalian cleavage the trophoblast cells secrete fluid into the morula to create a blastocoels this process called as ________.
A ________ is a cell derived from cleavage in an early embryo.
In Nematode cleavage is ________.
The narrow connecting stalk of extra-embryonic ________ that links the embryo to the trophoblast eventually forms the vessels of the umbilical cord.
In Tunicate cleavage during the next three divisions, differences in cell size and shape highlight the ________ of these embryos.
The cells adjacent to the chordamesoderm, the paraxial ________ cells, are the presursors of the mesodermal somites.
The ________ that are the precursors of the neutral tube invaginate into the embryo and are enclosed by neural folds.
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