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"Is there any difference between their tooth shape and the canine teeth of ordinary carnivores?" I cut in a question.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.红椒笑得站不稳，撑着青蒜肩膀喘气，一边道：南瓜，你还是有机会的。也就是说《白发魔女传》电视剧的平均收视率如果为1.8，那么它的价格将上浮5万。"Their attack capabilities are becoming more and more complex and elusive, and it is even difficult for security personnel to find out which IT stacks are their targets," she explained.Article 2 These Provisions shall apply to engaging in social fire-fighting technical service activities within the territory of the People's Republic of China and implementing qualification licensing, supervision and administration of fire-fighting technical service institutions.