<span>Answer: cell division by mitosis with little or no growth between successive divisions
Cell divisions in the embryonic development happen fast. This makes the cells don't have enough time to grow its membrane and its organelles. The lack of growth makes the cell size seems smaller as the division keep happening. </span>
Cleavage as part of embryonic development is idiosyncratic since it involves the cell division which includes the process of mitosis with minimal or no growth in successive divisions. Hope this is right and the correct answer you are looking for.
