And if these reproductive features developed gradually, how would the male and female of each species have survived while such vital features were still only partially formed?
Kui aga need paljunemise erijooned arenesid välja järk - järgult, siis kuidas sai iga liigi isane ja emane ellu jääda ajal, mil need elutähtsad erijooned ilmnesid vaid osaliselt?