2022名校学术联盟高考模拟信息卷押题卷理综十一答案

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2.D【解析】基因是有遗传效应的DNA片段,基因突变只发生在基因内部,基因突变的不定向性表现为个基因可以向不同的方向发生突变,产生一个以上的等位基因;诱变因素可以提高突变频率,但基因突变具有不定向性;基因突变具有普遍性,无论是否具有细胞结构均可发生基因突变;基因突变可以发生在生物个体发育的任何时期,体现了基因突变的随机性。故选D。比验,TAD出是基量n因,ATO

One possible versionDear peterKnowing that you are curious about the Tree Planting day in China, I'm writing to share withyou some information about itThe Tree Planting Day falls on March 12, when spring comes and it is getting warm. This issuch an important event that many new trees are planted in public places, such as parks, riverbanksand hills. On this day, we are encouraged to join the tree planting activities outdoors so that we canmake the earth a better place. The festival also spreads the idea that trees are necessary to helphuman beings survive on earth.you need more information, please feel free to let me know.Yours.Li hua