That is an important finding.Hitherto, biologists have tended to disaggregate the idea of fitness into a series of adaptations that are more or less independent of each other.

• 持这种观点的生物学家相信，象艺术和音乐能力一样，智力也是内在的基因适应性的一个可靠指标，这种适应性是在数百万年中通过异性的选择获得的。