GMAT
The many extant fossils yet to be attributed to a species suggest either that our classification of extinct species is deficient, many unclassified species meriting distinct branches on the taxonomic tree, or that our method of identification is lacking, with many fossils indeed attributable to known extinct species.
The many extant fossils yet to be attributed to a species suggest our classification of species that are extinct is either deficient, because many unclassified species merit on the taxonomic tree a distinct branch, or our method of identification is lacking, with many fossils indeed attributable to known extinct species.
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