【单选题】在自然状态下,某一桦树林中出现了云杉树苗,云杉长大后,高度超过桦树林。桦树不如云杉耐阴,而逐渐减少,最终形成以云杉为主的树林,这种现象是
【单选题】“将仇人的头发或穿过的衣物等埋藏,他们认为这就可置仇人于死地。”这种巫术的依据的原理是:
【单选题】Small interfering RNA (siRNA), sometimes known as short interfering RNA or silencing RNA, is a class of double-stranded, non-coding RNA molecules, ________ base pairs in length, similar to miRNA, and ...
【单选题】在自然状态下,某一桦树林中出现了云杉树苗,云杉长大后,高度超过桦树林。桦树不如云杉耐阴,而逐渐减少,最终形成以云杉为主的树林,这种现象是()
【单选题】In DNA double strands, the strand that guides the synthesis of RNA is called .
E.
None of the above is correct
【单选题】In the DNA double strand, the strand that guides the synthesis of RNA is called