题目内容
同源多倍体的植物与其二倍体物种比较,细胞、器官及生物个体无差异。( )
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生物体染色体数目变异可能会引起其染色体结构变异。( )
高秆()对矮秆()为显性,抗锈病()对感锈病()为显性,现以高秆抗锈×矮秆感锈,杂交子代分离出15株高秆抗锈,17株高秆感锈,14株矮秆抗锈,16株矮秆感锈,可知其亲本基因型为( )
19. We still _____ many advanced countries in environmental protection, but today we face a wonderful opportunity to address this problems, and we must not let the opportunity ________. A.lag behind, slip byB.have lagged after, slip awayC.have left behind, slide byD.have been lagged behind, slip off
【简答题】 ______ Translation:
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