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The second classification principle of organisms is the lineage classification principle aiming at establishing evolutionary lineage. The classification method following this principle is called lineage classification. The representative of pedigree classification is "branch systematics". It advocates that the branches in evolution should be taken as the criteria for identifying and distinguishing classification units and the basis for determining the pedigree relationship of each classification unit. The so-called co-ancestral proximity (similar to a group of people being a grandfather) is used to measure the genetic relationship between different taxa and determine their position in the pedigree. The classification system finally established is an evolutionary pedigree reflecting the history of phylogeny, which is a deeper description of biological relationship. In other words, the basic principle of pedigree classification is that the classification system conforms to the evolutionary pedigree. Pedigree classification is only applicable to organisms and cannot be used for abiotic classification.何霆哑口无言。Denial of service attack: An attacker intentionally causes a computer or network to fail to function properly by some means, thus failing to provide the required services to legitimate users or degrading the quality of service.4 View Events他站起身，走出禅房，示意护卫不要出声，探头往前面殿堂看了看。她当然不能太出格，侍奉祖母和母亲来慈宁宫才是女儿家该做的。这是一个战火频燃、纷争不断的动荡时代，一群有志之士集结在一起，计划盗走帝国大规模杀伤性武器“死星”的设计图。这个在《星球大战》系列里非常著名的重点事件，让一群平凡普通人结成了同盟，决定为世界的改变做出贡献；而在绝密行动的进行中，他们也逐渐成长为顶天立地的英雄。