Question

Eight to sixteen cell stage embryo is called ______

(a) Blastomere

(b) Zygote

(c) Blastula

(d) Morula

This question was posed to me by my college director while I was bunking the class.

I need to ask this question from Human Reproduction topic in section Human Reproduction of Biology – Class 12

Answer 1

The correct answer is (d) Morula

The explanation is: Zygote divides rapidly via the process of cleavage. Each division doubles the number of cells. The 8 to 16 cell stage embryo starts attaining a bolus shape and is hence called a morula. The morula later transforms into a blastula and then a blastocyst.