Why would a system of reproduction in which one organism simply divides into two ​ — and has done this very well for who knows how long — ​ develop into a system in which two things combine to form one?
Miks peaks paljunemissüsteem, mille puhul ühest organismist saab pooldumise teel kaks – ja mis on edukalt toiminud juba ei tea kui kaua –, arenema süsteemiks, mille puhul kahest geenikomplektist kombineerub üks?