EntityQ3324187· pop 8· linked from 11 articlesTwo-empire systemSign in to savetaxonomic theoryConnectionsplantEntityAnimaliaEntitybacteriaEntityeukaryoteEntityArchaeaEntityprotistEntityCarl LinnaeusEntityfungiEntityInternational Standard Book NumberEntitykingdomEntityprokaryotesEntitydigital object identifierEntitydomainEntityErnst HaeckelEntityprotozoaEntityQ180686EntitybibcodeEntityErnst MayrEntityQ229883EntityChromistaEntityCategoriesHigh-level systems of taxonomy