Q. Which one of the following statements with regard to embryonic development in humans is correct?
A) Cleavage divisions bring about considerable increase in the mass of protoplasm
B) In the second cleavage division, one of the two blastomeres usually divides a little sooner than the second
C) With more cleavage divisions, the resultant blastomeres become larger and larger
D) Cleavage division results in a hollow ball of cells called morula
Explanation
During embryonic development of human, in the second cleavage division, one of the two blastomeres usually divides a little sooner then the second. Cleavage is series of mitotic cell divisions that increase the number of cells but does not change the size of the original mass.
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.