Assertion: sporophyte's number | /r/CapableOf | have paved the way
Facets:
value: for c4
type: TRANSITIVE-OBJECT
Source sentences:
text: A number of 'pre-adaptations' seem to have paved the way for C4, leading to its clustering in certain clades: it has most frequently been innovated in plants that already had features such as extensive vascular bundle sheath tissue.