These sub-biomes develop due to changes in seasonal ... and low-growing perennial shrubs. The tundra biome contains only about 3% of the world’s flora. Up to 60% of the flora can be made up ...

Some of the world’s main biomes include rainforest, desert, savannah, grassland, woodland and tundra. Each biome has characteristics that make it unique, for example Alaska is a type of tundra.