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来源：学生作业帮 编辑：作业帮 分类：生物作业 时间：2024/05/13 01:19:08
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生物变异像赌博,绝大多数情况都会导致生物不适应环境而淘汰,但极个别时候会产生新基因新性状,这是生物进化的基础
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