Wherever humans exist, language exists.
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There are primitive languages_____Some languages are more complex and not equally capable of expressing any idea in the world.
A. 对
B. 错
It is conclusive that Chinese is regarded as the primeval language.
A. 对
B. 错
由幼嫩细胞变成成熟细胞的过程,叫做()。
A. 分裂
B. 分化
C. 脱分化
D. 再分化
植物组织培养主要是利用了()特性。
A. 细胞全能性
B. 减数分裂
C. 细胞生长
D. 细胞死亡