As Charles Darwin observed, natural selection operates whenever individuals of one genetic composition are better at reproducing than that of others.
that of others
the other
another
those of another
that of the next
登录 或 注册 后可以参加讨论
比较对象是individuals
扫描二维码，直接登录
比较对象是individuals
登录 或 注册 后可以参加讨论