AP BIOLOGY

Detailed explanation-1: -Whether hot or cold, the biodiversity of the desert is very low. In a hot desert environment, plants consist primarily of cacti. In a cold desert, mosses, lichens and fungi are found.

Detailed explanation-2: -There is very little biodiversity in hot deserts because of the harsh climate. Few species are specialised enough to survive there. Plants and animals which do survive there have adapted to difficult conditions.

Detailed explanation-3: -One thing all deserts have in common is that they are arid, or dry. Most experts agree that a desert is an area of land that receives no more than 25 centimeters (10 inches) of precipitation a year. The amount of evaporation in a desert often greatly exceeds the annual rainfall.

Detailed explanation-4: -Temperature. During the day, desert temperatures rise to an average of 38°C (a little over 100°F). At night, desert temperatures fall to an average of-3.9°C (about 25°F). At night, desert temperatures fall to an average of-3.9 degrees celsius (about 25 degrees fahrenheit).