Which of the Following is the Latest Stage of Development

Question

Which of the following is the latest stage of development?
A) Morula
B) Blastomeres
C) Blastocyst
D) Zygote

Accepted Answer

After fertilization, the zygote undergoes cell division forming blastomeres, which then form a compact ball called morula. Morula further develops into a fluid-filled structure called blastocyst, where the inner cell mass becomes the embryo and the outer cell mass becomes the placenta. Therefore, blastocyst is the latest stage of development.