Assertion: angiosperm's fertilization | /r/HasProperty | absent
Facets:
value: completely
type: DEGREE
value: in the former category
type: OTHER
Source sentences:
text: This is because double fertilization and triple fusion are absent in the former category, as a result the endosperm is formed before fertilization; while in the latter, the endosperm is the product of a triple fusion.
text: Double fertilization is a key event in the life cycle of angiosperms, but is completely absent in gymnosperms.