下列关于变异的叙述正确的是 a变异对生物都是有利的b变异对生物都是不利的c变异都是可以遗传的d由遗传物质改变引起的变异是可遗传 Template




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tomski下列关于变异的叙述正确的是 a变异对生物都是有利的b变异对生物都是不利的c变异都是可以遗传的d由遗传物质改变引起的变异是可遗传 coloring