Assertion: structure | /r/CapableOf | provide selective pressure
Facets:
value: for the removal of parts
type: PURPOSE
Source sentences:
text: In many cases the structure is of no direct harm, yet all structures require extra energy in terms of development, maintenance, and weight, and are also a risk in terms of disease (e.g., infection, cancer), providing some selective pressure for the removal of parts that do not contribute to an organism's fitness.