Assertion: ovum's nucleus | /r/HasProperty | polar nuclei
Facets:
Source sentences:
text: The two central-cell maternal nuclei (polar nuclei) that contribute to the endosperm arise by mitosis from the single meiotic product that also gave rise to the egg.
text: The two central cell maternal nuclei (polar nuclei) that contribute to the endosperm, arise by mitosis from the same single meiotic product that gave rise to the egg.