Question Detail

BIO 101 BIO 101 Past Questions Objective Question

Question

What is the correct sequence of early embryonic development?
Options
A Zygote → Cleavage → Morula → Blastula → Gastrula
Correct Answer
B Cleavage → Zygote → Morula → Blastula → Gastrula
C Zygote → Gastrula → Blastula → Morula → Cleavage
D Blastula → Zygote → Cleavage → Morula → Gastrula
Correct Answer

Option A is the correct answer.

Detailed Explanation

Fertilization forms a zygote, which undergoes cleavage (cell division) to become a morula (solid ball). A fluid-filled cavity forms, creating a blastula. Gastrulation then forms the germ layers.

Hint

It starts with a single cell and progresses to a structured, multi-layered embryo.

Question Info