Assertion: ovum's nucleus | /r/CapableOf | become separated
Facets:
value: by vertical cellwalls
type: CAUSE
value: from one another
type: OTHER
Source sentences:
text: The result of this is the production of four nuclei, which eventually take up a position at the bottom of the ovum and become separated from one another by vertical cellwalls; these nuclei divide again, and finally three tiers of cells are produced, four in each tier.