What is the modern classification system used by biologists?The Linnaean Hierarchy The Linnaean system of classification consists of a hierarchy of gradedtaxonomic (named) ranks that are called as taxa. Any given taxon (singular)may contain several lower taxa, which can be usually distinguished based oncertain common characteristics. Such lower ranks may in turn be divided into asuccession of progressively smaller ranks.Binomial Nomenclature It is the system of giving a scientific name to an animal or a plant, anoutstanding system contributed by Carolus Linnaeus. According to this system,any given animal or plant is given a scientific name consisting of two words.The first word refers to name of the genus while the second word refers to thename of the species.
Two Kingdom Classification The natural system of classification hasbeen subjected to periodic reviewing as a resultof the continuous input of information and newscientific tools being available on variousaspects of living organisms. Various schemesof classification are now available, each havingcertain merits and demerits. One of the earliestscheme of natural system classification is thetwo-kingdom classification proposed by CarolusLinnaeus in 1758.
Five Kingdom Classification The present trend in biology is to follow the fivekingdom classification proposed by R.H.Whittaker inthe year 1969.Summary The modern classification is an extension of thesystem of classification proposed by Carolus Linnaeus.The present system of classification involves a seriesof graded taxonomic ranks called taxa which includephylum and family in addition to the four taxaintroduced by Linnaeus.
Basis of classificationTo put things in order so they areeasier to findTo show how things share certaintraits
How did the modern classificationsystem come about?Carolus Linnaeus (1735)Called the two largest groups Kingdoms. Classified animalsand plants into more groups.Based his groups on specific traits. Gave organisms two-part names that described their traits (binomialnomenclature).It started from three and a half billion years ago whenrevolution just started.
Key characteristicsModern ClassificationGroups of classificationDomainKingdomPhylumClassOrderFamilyGenusspecies