人们能把野牛逐渐驯化成产奶量高的奶牛,是因为生物具有  (   ) A

人们能把野牛逐渐驯化成产奶量高的奶牛,是因为生物具有  (   )

A.新陈代谢的特征

B.生殖发育的特征

C.遗传变异的特征

D.生老病死的特征

答案

C

 

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