intrasexual selection

• refers to competition within a sex
• sperm competition ?


  males have evolved to produce larger amounts of sperm in each ejaculate in order to compete with rival sperm that may be inside the female they are trying to impregnate
• a03?


  evidence of this is seen in testes size: larger testes suggest more competition and comparatively the testes of humans are larger than gorillas who live in single male harems but they are smaller then chimpanzees, this suggests female humans must've been more promiscuous than first suggested