单选题:关于细胞分化的叙述,下列哪一项是错误的?( ) 题目分类:初中生物 题目类型:单选题 查看权限:VIP 题目内容: 关于细胞分化的叙述,下列哪一项是错误的?( ) A.细胞分化是一种持久性的变化,它发生在生物体的整个生命进程中 B.细胞分化在胚胎时期达到最大限度 C.随着细胞分化的进行。细胞中的遗传物质种类会发生变化 D.高度分化的动物细胞的细胞核保持着全能性 参考答案: 答案解析:
关于洋葱根尖分生区细胞的叙述,正确的是( )。 关于洋葱根尖分生区细胞的叙述,正确的是( )。 A.细胞分裂过程中核遗传物质的分配是随机不均等的 B.分裂期核DNA与染色体数目比值为1:1或2:1 C.用 分类:初中生物 题型:单选题 查看答案
请阅读短文,完成第题。 Anne Whitney, a sophomore at Colorado State Uni 请阅读短文,完成第题。 Anne Whitney, a sophomore at Colorado State University, first had 分类:初中生物 题型:单选题 查看答案
_________assessment is designed to provide a measure of per _________assessment is designed to provide a measure of performance that is in 分类:初中生物 题型:单选题 查看答案
Which stage of the speaking lesson is the least controlled b Which stage of the speaking lesson is the least controlled by teachers?A.Present 分类:初中生物 题型:单选题 查看答案
A student has something in his mind and he should ignore th A student has something in his mind and he should ignore the irrelevant parts a 分类:初中生物 题型:单选题 查看答案