Duba wurin da ke ƙasa sannan ka amsa tambayar daga baya a cikin harshe ɗaya kamar yadda wurin yake:  Passage: A cikin ilimin ƙasa na zahiri, tundra () wani nau'in halittu ne inda ƙarancin yanayin zafi da gajerun lokutan girma ke hana ci gaban itace. Kalmar tundra ta fito ne ta hanyar Rasha тундра (tûndra) daga kalmar Kildin Sami тӯндар (tūndâr) ma'ana "tsaunuka", "ƙauyen tsaunuka marasa bishiyoyi". Tsire-tsire na tundra ya ƙunshi ƙananan shrubs, sedges da ciyawa, mosses, da lichens. Bishiyoyi da suka warwatse suna girma a wasu yankunan tundra. An san ecotone (ko yankin iyakar muhalli) tsakanin tundra da gandun daji a matsayin layin itace ko layin itace.  Tambaya: Menene ma'anar kalmar tundra?
"ƙasa mai tsawo", "ƙasa mai tsaunuka marar itatuwa"