Assertion: wrangel island mammoth | /r/HasProperty | lost their selective value
Facets:
value: possibly
type: DEGREE
value: on the island environment
type: LOCATION
Source sentences:
text: Before their extinction, the Wrangel Island mammoths had accumulated numerous genetic defects due to their small population; in particular, a number of genes for olfactory receptors and urinary proteins became nonfunctional, possibly because they had lost their selective value on the island environment.