Question Detail
Question
Which one is the smallest in size? a. Blastula b. Blastomere c. Blastocoel d. Blastocyst
Correct Answer
Option B is the correct answer.
Detailed Explanation
A blastomere is a single cell produced by the cleavage divisions of the zygote. The blastula (or blastocyst in mammals) is a multicellular structure (hollow ball of cells) that is much larger than a single blastomere. The blastocoel is the fluid-filled cavity inside the blastula, which is a space, not a cell.
Hint
It's the individual cell, the building block.