Sexual reproduction demands males but they on their own usually do not produce offspring. Two general explanations to the overwhelming prevalence of sexually-reproducing species over asexual ones are: Ductus Deferens or Vas Deferens: Fibrous, muscular tubes that are continual with the epididymis and supply a pathway for sperm to vacation https://reproduction-in-cattle61382.vidublog.com/21769257/everything-about-reproduction-furniture-yeovil