Which structure is a solid ball of cells that forms about 3 days after fertilization?
A) Blastocyst
B) Embryo
C) Zygote
D) Morula

Question

Quizplus · Accepted Answer

A morula is a solid ball of cells that forms about 3 days after fertilization. The other choices are not accurate descriptions of this early stage of development. The blastocyst is formed about 5-6 days after fertilization when the morula hollows out and forms a fluid-filled cavity. The embryo is the term used to refer to the developing organism after the blastocyst stage, and the zygote is the single cell that forms when the sperm and egg unite.

Which Structure Is a Solid Ball of Cells That Forms