①细胞壁②染色体③四分体④中心体⑤核膜⑥赤道板⑦叶绿体.
A:2个
B:4个
C:6个
D:7个
The room is full of people and they are discussing an important thing.
如图表示雄果蝇体内某细胞分裂过程中,细胞内每条染色体DNA含量变化(甲曲线)及与之对应的细胞中染色体数目变化(乙曲线),下列有关叙述正确的是( )
That is not____kite. That kite is very small,but____is very big. (I)