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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.逢到路口，杨长帆微微拉缰，他便知往哪边拐。A long, a short, a long, a short sound.他一边说，南瓜等人一边笑，都说这日子赛神仙了。这期连载的《刀剑封神录》，正是一个大高.潮，主角手持神兵，打杀四方，干掉了一个一个大敌，让所有读者都大呼过瘾。少爷如今可大好了？黄夫人眼神一闪，跟着就笑道：已经好了，能下地走路了。