【摘要】 使用经典分子钟分子COX I蛋白质和作者提出的同源生物分子绝对进化速率计算公式,对"寒武纪生物大爆发"期间的一些主要动物门类分歧时间进行了计算。结果表明:原口动物和后口动物分歧时间为5.60亿年前,后口动物中的头索动物、尾索动物、半索动物和棘皮动物的分歧时间分别为5.36亿年前、5.40亿年前、5.48亿年前和5.45亿年前。这些结果与化石记录基本符合,明显好于现有分子钟理论得到的结果。为研究生物起源和演化提供了一种的新的思路和方法。更多还原

【Abstract】 By using the equation for calculating absolute evolutionary rates of biological molecules presented by the author and classic " molecular clock" Cytochrome oxidase subunit I( COX I) protein molecules,the metazoan phyla divergence times during Cambrian explosion were obtained. These results show that Protostomia and Deuterostomia separated at 560 million years( myrs) ago. The phyla divergence times of four major deuterstomia: Cephalochordata,Urochordata,Hemichordata and Echinodermata are 536 myrs ago,540 myrs ago,548 myrs ago and 545 myrs ago,respectively. These divergence times agree well with their fossil records,and are obviously better than those obtained by other current molecular clock methods. Our method may provide a new way to understand origins and evolution of creatures.更多还原