All of the Following Statements Are True EXCEPT

Multiple Choice

All of the following statements are true EXCEPT  

A) cytoplasmic localization occurs in all oocytes.
B) in a yolk-rich egg, most yolk is at one pole and the opposite pole has little yolk.
C) during cleavage, a furrow appears on the cell surface and defines the plane of the cut.
D) deuterostomes undergo bilateral cleavage.
E) cleavage results in descendant cells with different types and proportions of substances.