Terrestrial biomes are defined in a large part by
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.
Biomes are large areas on Earth with similar conditions, such as climates and living organisms. There are two main categories of biomes: 1  Terrestrial biomes are usually defined by the type of vegetation that is present.