The Evolution of Sex

The evolution of sex refers to how reproductive methods changed over time to increase survival and genetic diversity. Early single-celled organisms began exchanging genetic material to create beneficial variations. Developing specialized reproductive cells—sperm and eggs—allowed organisms to mix genetic material more efficiently. This process enhanced adaptability and resilience of species. Over millions of years, complex sexual behaviors and structures evolved, supporting reproductive success in diverse environments. Overall, the evolution of sex helped living things survive, adapt, and diversify, forming the foundation of the rich biological world we see today.