How do behavior, morphology and physiology act in concert to improve a male's reproductive success ... and the evolution of mating systems. Science 197, 215-223 (1977). Gibson, K.

Male and female reproductive systems allow human reproduction. Fertilisation occurs when a sperm and egg join to form an embryo. An embryo develops into an unborn baby in the uterus during pregnancy.

typically happens during sexual reproduction. harem: A group of females associated with a single male. Typically the male in the harem defends his group of females. lek: A mating system which ...

University of Manchester scientists have discovered significant concentrations of microplastics in the male reproductive ...

The male and female reproductive system The male reproductive system ... half the normal number of chromosomes. An acrosome (part of the tip of the head) that releases enzymes to digest the ...

The race will feature sperm samples competing in real-time via high-resolution imaging on a microscopic racetrack modelled on ...

Male reproductive system is straightforward ... This is a chorioallantoic placenta. Chorion forms part of fetal tissue, allantois becomes greatly enlarged and highly vascularized. Chorioallantoic ...

By controlling male fertility, this new gene could help address challenges in the development of highly productive hybrid wheat.    Wheat provides 20% of global food calories, but creating ...

Male reproductive system is straightforward ... This is a chorioallantoic placenta. Chorion forms part of fetal tissue, allantois becomes greatly enlarged and highly vascularized. Chorioallantoic ...