But a still more important consideration is that the chief part of the organisation of every living creature is due to inheritance; and consequently, though each being assuredly is well fitted for its place in nature, many structures have now no very close and direct relation to present habits of life.
Baina gogoramen are inportanteagoa da izaki bizidun ororen organizazioaren parte nagusia herentziaren ondorio dela eta, beraz, nahiz eta ziur izan izaki bakoitza naturan duen lekura ongi egokiturik dagoela, egitura askok ez du egun erlazio oso hertsirik eta zuzenik oraingo bizi-azturekin.