A common carrier is distinguished from a contract carrier (also called a public carrier in UK English), which is a carrier that transports goods for only a certain number of clients and that can refuse to transport goods for anyone else, and from a private carrier.
Topography is the variety of shapes found on the landscape determined by slopes, elevation and aspects. The topography of grassland ecosystems is a varied landscape of gently rolling hills and prairies, rock outcrops, cliffs, gullies, and low lying areas. Diverse topography is what gives incredible variety to grassland ecosystems. Aspect refers to the direction in which a piece of land is facing. Areas that face towards the south, or the sun, are hotter and drier than areas that face north, or away from the sun. The slope of an area is the angle at which the land lies.
The grasses in the tropical grassland biome tend to be taller than that of the temperate because of the constant warm weather and additional rainfall it receives. Since grassland biomes have rich soil, much of them are used for farming. There is only 2% of the original grassland left in North America.rassland Biome Facts. Grassland biomes are made mostly of grasses. They are said to be between a forest and a desert when it comes to rainfall. They do not receive enough rainfall to grow trees like a forest but they contain lots of grass so they receive more rain than a desert.