?? ??: ?? ??? ??? ??? ???? ??? ???? ? ??? ???. ??? ?????? ? ??? ??? ? ????. ??? ???? ??? ??? ? ??? ???? ??????. ?? ? ??? ???/?/?? ??? ??? ?? ? ????. ??? ?? ? ???? ?? ???? ??? ??? ?? ??? ?? ??????? ????? ??? ???? ??? ??? ??? ?? ? ?? ???? "??? ?? ?? ???? ??? ??? ??? ?" ??? ???? ????. ?, ? ??? ?? ?? ????? ???? ?? ?? ?. ? ??? ??? ????? ? ? ?? ???? ?

Parthenogenesis is often a purely natural kind of copy through which progress and enhancement of embryos manifest without having fertilization. Agkistrodon contortrix (copperhead) and Agkistrodon piscivorus (cottonmouth) can reproduce by facultative parthenogenesis, indicating that they are effective at switching from a sexual method of replica to