AP BIOLOGY

Detailed explanation-1: -Temperate grasslands are characterized by the predominant vegetation i.e. grasses. Temperate grasslands generally have no trees. Temperatures can vary very much in this biome. In winters, the temperatures can be too low.

Detailed explanation-2: -Because of the low annual precipitation, temperate grasslands have very few trees. Grasses are the dominant vegetation; their roots and rhizomes provide increased fertility to the soil. Fires caused by lightening occur often in grasslands; without fires grasslands are converted to scrub forests.

Detailed explanation-3: -The main temperate grasslands are the steppe in Eurasia, the prairies of North America, the downs of Australia and New Zealand and the pampa of Argentina.

Detailed explanation-4: -While temperatures are often extreme in some grasslands, the average temperatures are about-20°C to 30°C. Tropical grasslands have dry and wet seasons that remain warm all the time. Temperate grasslands have cold winters and warm summers with some rain.

Detailed explanation-5: -Savanna. Savanna is grassland with scattered individual trees. Savannas of one sort or another cover almost half the surface of Africa (about five million square miles, generally central Africa) and large areas of Australia, South America, and India. Climate is the most important factor in creating a savanna.