Embryology rises greatly in interest, when we look at the embryo as a picture, more or less obscured, of the progenitor, either in its adult or larval state, of all the members of the same great class.
Enbriologiak gora handia egiten du interesgarritasunean, enbrioia klase handi bereko kide guztien gurasolehenaren heldu-egoerako zein larba-egorako erretratutzat, gutxi-asko ezabaturiko erretratutzat, hartzen dugunean.