Sperm cells compete in a never-ending race _亚博娱乐官网_亚博pt手机客户端登录

Yngve Vogt
2014-05-12T08:30:59.716Z
type:structured-article
www.uio.no

Promiscuous bird species have less variation in their sperm cells. The explanation is the fierce competition that occurs between sperm cells when more than one male mates with the same female.