Question

multiple choice question
at a certain point in development, the developing embryo is a hollow ball of cells called a _.
blastocyst
trophoblast
ovum
morula
fetus

Explanation:

• A blastocyst is a hollow ball of cells that forms during early embryonic development.
• The trophoblast is the outer layer of cells in the blastocyst.
• An ovum is a mature egg cell.
• A morula is a solid ball of cells.
• A fetus is a more developed stage of the embryo.

Answer:

blastocyst