Almost all forms of complex life have both male and female. Horses, dogs, humans, moths, monkeys, fish, elephants, birds, etc. The male needs the female to reproduce, and the female needs the male to reproduce. One cannot carry on life without the other. The Bible tells us that " He who made them at the beginning made them male an female. "
Matt. 19: 4
But if evolution is true, which than came first according to the evolutionary theory?