Final answer:
Sexual selection in humans is stronger for men due to various evolutionary factors such as the good genes hypothesis and the Fisherian runaway model. This results in distinct physical differences between men and women.
Step-by-step explanation:
Sexual selection in humans is stronger for men compared to women due to various evolutionary factors. One explanation is the good genes hypothesis, which suggests that men develop impressive traits to demonstrate their genetic superiority, such as efficient metabolism or the ability to fight diseases. Women then choose males with these traits because it signals higher genetic quality, which they can pass on to their offspring.
Another concept is the Fisherian runaway model, which proposes that certain traits are selected due to sexual preference. In this case, women may show a preference for men with more impressive traits, leading to the evolution of sexual dimorphism. Overall, sexual selection in humans can result in distinct physical differences between men and women.