To map 100 mutants by this method would necessitate nearly 5,000 crosses.用这种方法来绘制100个突变型的遗传图就要做5000个杂交.Aspergillus Oryzae mutants . High pressure seems an efficient approach for mutagenesis.继各种化学制剂、各种射线诱变等方法之后, 高压不失为一种行之...
Substantial numbers of rank and file members ignored their union's advice.有相当一部分普通员工不理睬工会的建议。Faculty members complain that their students are unprepared to do college-level work.学院的老师们抱怨说他们的学生还很不适应大学的课业。They've...