【简答题】在正反交情况下,子代某些性状相似于其雌性亲本的现象,有的是由于细胞质( )传递的结果,属于( )的范畴,但有的却由于母本中核基因的某些产物积累在卵细胞的细胞质中,使子代表型与母本相同,这种现象称为( )。 (中国科学院水生生物研究所2002年考研试题)
【单选题】蛋白质变性常伴随的变化,有下列( )现象描述错误。
【单选题】影响国际市场营销最经常、最直接的法律环境因素是
【判断题】Other people ’ s time is also important, so don ’ t waste other ’ s time
【判断题】分光光度法中,各待测组分的吸光值最佳范围是0.5~0.8( )
【单选题】在S.S平板上形成无色,细小、透明或半透明菌落的细菌有( )
【单选题】在S.S平板上形成无色,细小、透明或半透明菌落的细菌是
【判断题】分光光度法中,各待测组分的吸光值最佳范围是0.5~0.8( )
【单选题】A Many children feel that the most important people in their lives are their friends.They be- lieve that their family members don-t know them as well as their friends. In large families, it is quite o...