问题
单项选择题
通过缺陷性噬菌体为媒介，把供体菌的DNA片段携带到受体菌中，从而使后者获得前者的部分遗传形状的现象为（）。
A、转导
B、转化
C、性导
D、接合
答案
参考答案：A
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通过缺陷性噬菌体为媒介，把供体菌的DNA片段携带到受体菌中，从而使后者获得前者的部分遗传形状的现象为（）。
A、转导
B、转化
C、性导
D、接合
参考答案：A
| 补全对话 | |
B: Yes, that's right. 1 We need some photos of animals. A: Do you know how to get there? B: Yes, I've got a map. 2 A: What do you know about it? B: It's an area where there are lots of different animals. A: 3 B:I know there are many different kinds of birds.Oh, look at those photos of birds. 4 A: Wow, how beautiful! I'm going to take my camera with me. And I'm in with a chance to win. B: Why? A: My digital camera works very well, and I'm interested in taking photos. B: 5 | |
| 1. _____ 2. _____ 3. _____ 4. _____ 5. _____ |