cell cleavage in a sentence

1. "Xenopus " membrane polarity is established with the first cell cleavage.
2. This enabled detailed, quantitative studies of the process of cell cleavage ( cytokinesis ).
3. In contrast, the amphioxus and vertebrates show cell determination relatively late in development and cell cleavage is indeterminate.
4. Based on this work, Dan proposed the novel idea that cell cleavage is driven directly by elongation of the mitotic spindle.
5. For a number of cell cleavages ( the specific number depends on the type of organism ) all the cells of an embryo will be morphologically and developmentally equivalent.
6. It's difficult to find cell cleavage in a sentence.