现代生物进化理论以自然选择学说为核心,对遗传变异的研究已从性状水平深入到了基因水平,对自然选择作用的研究已从个体水平上升到了种群水平。例1根据现代生物进化理论,下列说法正确的是()A.甲捕食乙,两种动物个体数量长期保持稳定,说明这两个种群的基因频率没有改变 The theory of modern biological evolution centers on the theory of natural selection. The study of genetic variation has gone from the trait to the genetic level, and the study on the role of natural selection has risen from individual level to population level. Example 1 According to the theory of modern biological evolution, the following statement is correct () A. A predator B, the number of individuals in both animals remained stable, indicating that the two populations did not change the gene frequency