关于人体细胞分化、衰老、凋亡和癌变的叙述,正确的是  A.细

 关于人体细胞分化、衰老、凋亡和癌变的叙述,正确的是 

A.细胞分化导致基因选择性表达,细胞种类增多

B.细胞的衰老并不能说明动物个体已经衰老

C.细胞凋亡受基因控制,不利于个体生长发育

D.细胞在癌变的过程中发生了基因突变和基因重组

答案

B

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