皮皮学，免费搜题
登录
搜题
【单选题】
粘液表皮样癌中粘液细胞不足10%，肿瘤主要由中间细胞或表皮样细胞实性团块组成。病理诊断应为A.
粘液表皮样瘤
B.
高分化粘液表皮样癌
C.
低分化粘液表皮样癌
D.
中分化粘液表皮样癌
E.
以上都不是
手机使用
分享
复制链接
新浪微博
分享QQ
微信扫一扫
反馈参考答案：
举一反三
【简答题】遗传物质改变引起的变异属于______的变异，仅由______引起的变异属于不可遗传的变异．
【多选题】What is an intron?
A.
Most protein-coding eukaryotic genes, in contrast, have their coding sequences interrupted by long, noncoding, intervening sequences called introns.
B.
The scattered pieces of coding sequence—called expressed sequences or exons—are usually shorter than the introns, and they often represent only a small fraction of the total length of the gene.
C.
Introns range in length from a single nucleotide to more than 10,000 nucleotides.
D.
Some protein-coding eukaryotic genes lack introns altogether, some have only a few, but most have many.
参考解析：
知识点：
题目纠错 0
发布
