当 F - 菌株和 F + 菌株发生接合时, F 因子会发生转移,并使 F - 菌株变化为 F + 菌株。
A.
正确
B.
错误
拍照语音搜题,微信中搜索"皮皮学"使用
参考答案:
参考解析:
知识点:
皮皮学刷刷变学霸
举一反三
【简答题】We all remember seeing hitchhikers, standing by the side of the road, thumb, sticking out, waiting for a lift. But it is getting rare nowadays. What killed hitchhiking? Safety is often mentioned as a ...
【简答题】用所给单词的适当形式填空。 f riend comfort attract complex honesty 1. The workers from countryside want to have a _______ house in the city so much. 2. The Chinese students are very __________ to their new classma...