问题
选择题
与有丝分裂相比较，减数分裂过程中染色体最显著的变化之一是[ ]
A．染色体移向细胞两极
B．同源染色体联会
C．有纺锤体形成
D．着丝点分开
答案
答案：B
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与有丝分裂相比较，减数分裂过程中染色体最显著的变化之一是[ ]
A．染色体移向细胞两极
B．同源染色体联会
C．有纺锤体形成
D．着丝点分开
答案：B
| 在横线上填写正确单词。 | |
Wang Hai: Yes! You can talk! What's your name? Snowman: I don't _________ I have a name. Wang Hai: Can you _________? Snowman: I don't know. I have never skated. Wang Hai: Do you want to _________? I can _________ you. Let's go! Snowman: Wow! It's fun. Can we always skate? Wang Hai: No. _________ is coming. Then comes _________ and _________. Snowman: _________ can't we skate in spring, summer and fall? Wang Hai: _________ it'is too warm. There is _________, but there is no _________ and _________. Snowman: And no snowman. |