Terrestrial biome is a land biome such as rain forest, deciduous forests, tundra and such By the way, extra terrestrial is from outer space, like E.T. ;).Green Phoenix · 7 years ago.Thumbs up. 0.errestrial biome is a land biome such as rain forest, deciduous forests, tundra and such By the way, extra terrestrial is from outer space, like E.T. ;). Green Phoenix · 7 years ago. Thumbs up. 0.