发育重演律与生物进化

摘要

发育重演律是生物个体发育的一般规律,该规律认为生物个体的发育是类囊胚不断形成和演化的过程,并认为生物进化亦是类囊胚不断形成和演化的过程,因类囊胚层级不断增加而导致的生物体结构复杂程度提高的演化为纵向进化,而不能提高生物体复杂程度的演化为横向演化,生物的纵向进化具有周期性.生物种系进化与个体发育之间具有严格的对应关系,一个物种经历的纵向进化的周期数与该物种所属个体完成发育所经历的细胞分化的周期数相等.%The ontogenic law is a universal law of organism development. According to this law, organism development and evolution are both processes of repetitive blastocyst-like structure (BLS) formation and development.The evolution which increases the BLS levels and enhances the complexity of organism is named vertical evolution, while the evolution which can not enhance the complexity of organism is named horizontal evolution. The vertical evolution of organism is periodical. Phylogenetic evolution corresponds to organism ontogeny strictly. The number of the vertical evolution cycles which a species has gone through is equal to that of the cell differentiation cycles which the individual from the species to complete development does.