Question

A morula can be differentiated from blastula in

• A. Presence of cavity
  
• B. Absence of cavity
  
• C. Presence of more yolk
  
• D. Presence of yolk
  

Answer 1

The correct option is B Absence of cavity


Blastocyst

After morula, a 64 celled stage is formed which is called blastula. Blastula is a hollow sphere of cells, or blastomeres, enclosing a fluid-filled cavity, the blastocoel. It is called blastocyst in mammals. So the morula lacks a cavity but the blastula has a cavity called blastocoel.

Final answer:

(d) Absence of cavity