Ageing helps keep the population diverse, mitigating the problem of inbreeding depression, the well-known tendency for offspring of closely-related parents to have excessive genetic defects.

• 老化有助于保持种群多样化，减轻近交衰退的问题（众所周知，密切相关的双亲的后代有发生过多遗传缺陷的趋势）。