Assertion: embryo's gill slit | /r/HasProperty | trait
Facets:
Source sentences:
text: That a human embryo has gill slits can be understood only by inheritance from early vertebrate ancestors; that we walk upright can be understood as an adaptation, a trait favored by natural selection in our more recent ancestors.
text: That a human embryo has gill slits can be understood only by inheritance from early vertebrate ancestors; that we walk upright can be understood as an adaptation, a trait favored by natural selection in our more recent ancestors.