Which Stage of Development Immediately Precedes the Formation of Specialized

Question

Which stage of development immediately precedes the formation of specialized tissue and organs?  
A) Gamete formation
B) Cleavage
C) Gastrulation
D) Blastulation
E) Binary fission

Accepted Answer

Gastrulation is the stage of development in which the cells in the blastula rearrange themselves to form the three germ layers (ectoderm, endoderm, and mesoderm) from which specialized tissues and organs will later develop. Therefore, gastrulation immediately precedes the formation of specialized tissue and organs.