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Dichotomous key biology8/11/2023 ![]() ![]() Most of them can be crystallised like chemical molecules.They are metabolically inactive outside the host cell.Viruses do not fit neatly into any of the above kingdoms. Organisms are classified into five kingdoms. The names are written in italics or are underlined in manuscripts.The generic name starts with a capital letter while that of the species starts with a small letter.The second name is the name of the species.The first name is the generic name - the name of the genus.This system of naming was devised by Carolus Linnaeus in the 18 th Century.This double naming is called binomial nomenclature.Living organisms are named using Latin or Latinised names.Others are phylum (division for plants) class, order, family, genus and species, the smallest.There are seven major taxonomic groups.Modern studies in genetics and cell biochemistry are used to give additional help in classifying organisms. ![]() Organisms with similar anatomical and morphological characteristics are placed in one group while those with different structures are grouped separately.Modern scientific classification is based on structure and functions.Classification is the science that puts organisms into distinct groups to make their study easy and systematic.Some Common Features Used for Identification.Rules Used to Construct a Dichotomous Key. ![]()
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