Stochastic processes at molecular, cellular and higher levels in organisms are not simply noise. Organisms also use stochasticity at all levels to generate new DNA sequences, as in the immune system, and new forms of behaviour, as in the nervous system. The harnessing of stochasticity therefore endows organisms with the means to actively influence the direction of their development and evolution.

中文翻译：

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随机性在生物通讯过程中的作用

生物体中分子、细胞和更高水平的随机过程不仅仅是噪音。生物体也在各个层面使用随机性来产生新的 DNA 序列，如在免疫系统中，以及在神经系统中的新行为形式。因此，利用随机性赋予生物体积极影响其发展和进化方向的手段。