Hence the improved and modified descendants of a species will generally cause the extermination of the parent-species; and if many new forms have been developed from any one species, the nearest allies of that species, i.e. the species of the same genus, will be the most liable to extermination.
eta espezie bateko forma asko garatu badira, espezie honen ahaide hurbilenek, hau da, genero bereko espezieek, izanen dute suntsituak izateko arriskurik handiena.