A competing theory is that a mutagenesis drug may eradicate a virus or bacterialpopulation by reducing the fitness to negative values.
一个竞争性的理论是诱变药物通过降低对负面价值的适应性而根除病毒或细菌群体。
3
The soil nutrient index calculated from bacterialpopulation indicated that the nutrient levels of the four grass-forest systems were very low, only between 0.003 and 0.014.