【单选题】接合是指
A.
受菌通过温和噬菌体获得供菌DNA,而出现新性状
B.
细菌通过性菌毛相互沟通将遗传物质从供菌转移给受菌
C.
前噬菌体DNA整合于细菌染色体导致细菌的基因型发生改变
D.
供菌游离的DNA片段直接进入受菌,使受菌获得新的性状
E.
受菌与供菌通过原生质融合而发生基因重组,使受菌出现新的性状
【单选题】She ______ at the thought of picking up the dead animal.
【单选题】通过性菌毛将供体菌的 F质粒传递给受体菌,使后者获得新遗传性状 的现象,称为:
【单选题】阅读理解:请根据短文内容,为每题确定l个最佳选项。
How We Form First Impression。
We all have first impression of someone we just met. But why Why do we form an opinion about someone without really knowing anything about h...
A.
One’s physical appearance can influence our first impression.
B.
Our first impression is influenced by the sensitivity of our brain.
C.
Stereotypical impressions can be dead wrong.
D.
We should adopt mature thinking when getting to know people.
【简答题】Picking
up the dead cat, Mr. Franklin decided to________.A. throw
it into the bush B. find
the owner of the cat C. put
it into his car and drive
away D. a.bury
it somewhere near the road
【单选题】两个细菌接触,供体菌通过性菌毛将DNA直接转入受体菌内,使受体菌获得新的性状,被称为
【单选题】已知正数a、b、c成等比数列,则下列三数也成等比数列的是
【单选题】供体菌通过性菌毛将DNA转入受体菌内,使受体菌获得新的遗传性状 , 其基因转移和重组的方式是:
【单选题】转化是指
A.
受菌通过温和噬菌体获得供菌DNA而出现新性状
B.
细菌通过性菌毛相互沟通将遗传物质从供菌转移给受菌
C.
前噬菌体DNA整合于细菌染色体导致细菌的基因型发生改变
D.
供菌游离的DNA片段直接进入受菌,使受菌获得新的性状
E.
受菌与供菌通过原生质体融合而发生基因重组,使受菌出现新的性状