有时,一个生物个体的细胞内的DNA可能会改变或损坏。这些随机错误被称为突变。变化了的DNA传递给后代,就会导致遗传变异,这可能是物种进化的自然选择。赢家或输家?突变是罕见的,但随着时间的推移,逐渐增强产生影响。被遗传的突变或许不会对个体产生影响,或许会对个体产生有害影响,或许会给予个体竞争优势。通过自然选 Sometimes, DNA within a living individual's cells may change or be damaged. These random errors are called mutations. The change of DNA passed on to offspring leads to genetic variation, which may be a natural choice for species evolution. Winners or losers? Mutations are rare, but over time, they gradually increase their impact. Genetic mutations may not affect individuals, may have harmful effects on individuals, may give individual competitive advantage. Through natural selection