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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.MyHandler h1 = new MyHandler ("h1");陈王采纳的他们的意见，派武臣为将军，以他和张耳为校尉，率兵三千前往略地。老者道：也好，总比困在这三川郡被人怀疑的好，只要此战立下战功，谣言不攻自破，看赵高还能说什么？李由苦笑道：但愿吧，清者自清，我是大秦将领，自当为恪尽职守。后来越王尹旭直接率大军进城，军队的精锐程度和战斗力让越国人都为之一惊。以及众人的注意力都集中在了关中，所以萧何的压力一点都不小。二人被抓个正着，心里后悔害怕，自是点头认同这话。