题目详情

根据现代生物进化理论,下列说法正确的是(  )。

  • A.微山湖中所有的鱼具有共同的基因库
  • B.环境、突变及基因重组产生的变异为进化提供原材料
  • C.生物多样性的形成过程也就是新物种不断形成的过程
  • D.外来物种入侵能改变生物进化的速度和方向

正确答案及解析

正确答案
D
解析

基因库是指一个种群中全部个体的所有基因,而微山湖中所有的鱼不是一个种群,故A错误;突变(基因突变和染色体变异)及基因重组产生的变异为进化提供原材料,故B错误;生物多样性包括基因多样性、物种多样性和生态系统多样性,所以生物多样性的形成过程不仅仅是新物种的形成过程,故C错误;外来物种入侵会改变现有生物的生存状况,能使生物进化的方向和速度发生改变,故D正确。

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