下列有关细胞的生命历程的叙述，正确的是

题干

下列有关细胞的生命历程的叙述，正确的是（）

A：细胞衰老时其形态、结构和功能都会发生改变

B：细胞的程序性死亡不利于生物的生长和发育

C：老年人易患癌症的原因是老年人的基因更易突变

D：胰岛素基因和胰高血糖素基因可在同一个细胞中表达

上一题下一题 0.0难度选择题更新时间:2019-04-23 02:52:36

A

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Gina	I like to make friends with those who are the same as me. The similarity doesn't have to be about looks, but about hobbies and interests, But the most important thing is that they must be honest(诚实的).
Jenny	I want to make friends with people who bring me happiness, give me a hand and support me.
Mark	I would like to make friends with people who are different from me. We maybe sometimes don't agree with each other, but with friends like these I can learn different ways of thinking.