【单选题】( )is a translucent gelatinous substance between the cell membrane and the nucleus.
【简答题】对流层气温随高度增加而降低的主要原因是()。
【单选题】Richard Seed claimed to be able to clone__________
C.
a human being in two years
D.
a law to ban human cloning
E.
a report on human cloning
【单选题】对流层随高度增加,温度降低的原因是( )
【简答题】写出对应的英文单词 Any nucleus, cell, or organism that possesses twice a single set of unpaired chromosome.
【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。
【简答题】Any nucleus, cell, or organism that possesses twice the haploid number of chromosomes. During the process of fertilization a zygote with the diploid set is produced.