Which Association is Incorrect

Question

Which association is incorrect?
A)Gastrula-blastopore
B)Blastula-blastocoel
C)Primitive streak-morula
D)Gut-archenteron
E)Cleavage-zygote

Accepted Answer

During the gastrula stage,the mesoderm will arise as cells invaginate along the edges of a longitudinal furrow in the midline of the embryo.Because of its appearance,this furrow is called the primitive streak.Later,the newly formed mesoderm splits to produce a coelomic cavity.