Which one of the following statements with regard to embryonic development in humans is correct?
- ACleavage divisions bring about considerable increase in the mass of protoplasm
- BIn the second cleavage division,one of the two blastomeres usually divides a little sooner than the second
- CWith more cleavage divisions,the resultant blastomeres become larger and larger
- DCleavage division results in a hollow ball of cells called morula
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