A biome is a large geographical area of distinctive plant and animal groups which are adapted to that particular environment.
- Most terrestrial biomes are defined by the dominant plant life. The plant life is determined in part by the climate in a region, and climate is controlled by many factors, including latitude and geography.
- The distribution of biomes is determined by environmental conditions, which must be appropriate to support the dominant species. Moisture and temperature are usually the most important environmental influences on the distribution of terrestrial biomes