【单选题】《动物防疫法》规定,根据动物疫病对养殖业生产和人体健康的危害程度,共可以分为几大类( )。
【单选题】( )is a translucent gelatinous substance between the cell membrane and the nucleus.
【单选题】The genetic mateiral in the nucleus of the cell is called the ______.
【单选题】According to it's function what best reflects the nature of the cell nucleus is ( )
A.
Associated with genetic variation in organisms;
B.
Related to the continuation of life
C.
The nucleus divides firstly when the cell and mitosis;
D.
The main place for DNA storage and replication
【单选题】对流层随高度增加,温度降低的原因是( )
【判断题】我国动物防疫法根据动物疫病对养殖业生产和人体健康的危害程度,规定管理的动物疫病分为三类。
【单选题】The genetic material in the nucleus of the cell is called the ______ .