The main difference between desert and tundra biomes lies in their climate, vegetation, and geographical locations.
Desert Biomes: Deserts are characterized by extremely low precipitation, often receiving less than 250 mm of rain per year. They can be hot, like the Sahara Desert, or cold, like the Gobi Desert. The vegetation in deserts is sparse and typically consists of drought-resistant plants like cacti and succulents. Deserts are usually found in subtropical and tropical regions.
Tundra Biomes: Tundras, on the other hand, are characterized by extremely cold temperatures and a short growing season. They receive more precipitation than deserts, but it is mostly in the form of snow. The vegetation in tundras is limited to low-growing plants like mosses, lichens, and small shrubs. Tundras are found in the Arctic and Antarctic regions, as well as on high mountain tops.
In summary, while both biomes are extreme environments, deserts are defined by their lack of precipitation and can be either hot or cold, whereas tundras are defined by their cold temperatures and short growing seasons.