Expression of many genes in cells are requlated Housekeeping genes expressed constitutively, essential for basic processes involving in cell replication and growth. Inducible genes expressed only when they are activated by inducers or cellular factors

一、总论 二、人兽共患病的病原 三、人兽共患病的实例 四、人兽共患病的预防、免疫

Part l: Maintenance of the genome Dedicated to the structure of NA and the processes that propagate, maintain and alter it from one cell generation to the next

There are genetic processes that rearrange DNA sequences and thus lead to a more dynamic genome structure

Occurs The borders between introns and exons are marked by specific nucleotide sequences within the pre-mRNAS

一、什么是生物多样性 二、生物多样性对人类生活的意义 三、生物多样性受威胁现状及原因 四、保护生物多样性的途径(或措施)

All DNA is recombinant DNA. Genetic exchange works constantly to blend and rearrange chromosomes, most obviously during meiosis, when homologous chromosomes pair prior to the

1稳态是什么? 2稳态是绝对静止吗? 3怎样维持稳态? 4稳态是生理学的核心概念 5小结

一、遗传:生物世代间的延续 二、变异:生物个体间的差异 三、遗传学:研究生物的遗传与变异的学科

东北农业大学生命科学学院：《植物生理学》课程教学资源（电子教案）第三章 植物的矿质营养