Assertion: platypus's electroreceptor | /r/HasProperty | selected
Facets:
value: evolutionarily
type: MANNER
Source sentences:
text: This suggests that the electroreceptors on the two types of echidnas, whose habitat ranges from tropical forests to alpine forests to deserts, are evolutionarily being selected against because such sensing ability is only useful in semi-aquatic environments (Pettigrew 1999).