Why is sexual reproduction remarkable? 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?
اما معظم الحيوانات والنباتات فتتكاثر جنسيا ،‏ مما يتطلَّب جمع المعلومات الوراثية من الذكر والانثى كليهما ،‏ عملية تثير العجب حقا .‏