NEET BIOLOGY

Detailed explanation-1: -Morula is a cell type which undergoes mitotic division thereby resulting in the production of around 32 cells. This 32-cell stage is thus referred to as blastula wherein all the cells are of the same size as that of the zygote. Therefore, this is the correct option.

Detailed explanation-2: -Formation. The morula is produced by a series of cleavage divisions of the early embryo, starting with the single-celled zygote. Once the embryo has divided into 16 cells, it begins to resemble a mulberry, hence the name morula (Latin, morus: mulberry).

Detailed explanation-3: -At the 32 cell stage of division, the embryo is known as a blastula that contains inner cell mass and outer cell mass.

Detailed explanation-4: -The term morula is used to designate the ensuing stages of embryonic development (16, 32, and 64 cells). The morula is thus the product of the first cell cleavages, which result in practically no growth, because the daughter cells become smaller and smaller. The morula is like a solid ball.

Detailed explanation-5: -Blastomere :-when after formation of morula 4 days is completed a structure like that of mulberry gets formed. It consists of 16-32 celled stages. It is also called as morula stage 2. The embryoblast and trophoblast get formed at this stage.