易位杂合体所联合的四体环,如果在后期Ⅰ发生交替分离,则所产生的配子都是可育的。
参考答案:对
哲学是理论化系统化的世界观。以下属于哲学层面的意识现象是 [ ]
A.民间的“实惠”思想
B.《老子》的思想
C.欧几里德《几何原本》的思想
D.《本草纲目》的思想
What happened to the Nuclear Family in the middle of the twentieth century
A.It changed greatly.
B.It was criticized.
C.It remained a normal structure.
D.It was lost.