Question

Differentiate between :
Morula and blastula

Answer 1

Morula is a solid mass of cells (blastomeres) formed by the fertilized ovum as a result of cleavage. Here, there is increase in the number of cells but does not change the size of the original mass. But blastula is a two-layered ball of cells formed by a dynamic rearrangement of blastomeres. Moreover, blastula has a cavity around which the cells are arranged.