Assertion: monotreme | /r/CapableOf | tread water
Facets:
value: in an evolutionary sense
type: MANNER
Source sentences:
text: The hint that echidnas may have evolved after marsupials arrived in Australia "contradicts the common assumption that monotremes are living fossils just treading water in an evolutionary sense, and waiting to go extinct in the face of competition with 'superior' mammals, like marsupials," Phillips added.