← Intro. to Ecology and the Biosphere Export Options Alphabetize Word-Def Delimiter Tab Comma Custom Def-Word Delimiter New Line Semicolon Custom Data Copy and paste the text below. It is read-only. Select All permafrost ground that is permanently frozen savanna a flat grassland in tropical or subtropical regions chaparral dense vegetation consisting of stunted trees or bushes coniferous forest forest populated by cone-bearing evergreen trees; mostly found in northern latitudes regulators and conformers a regulator uses homeostasis to to moderate internal changes; a conformer allows some conditions within its body to fluctuate with its environment