What are the desert region of biomes?

These are found everywhere around the world. They occur in the border areas and cold ocean currents. They occur in the cloud covering mountains and in the rain shadow. This is defined as an area of earth which does not receive any rainfall. This may be due to the non interception of clouds. This may also occur due to the absence of clouds and mountains. The clouds are cut off due to the high mountains. They are present in the North of Himalayas and the Thar Desert. The main deserts occur in the America, Africa and Australia including the Chile, Mexico and Peru. The annual rainfall is very low and it is around 25 centimeter. The deserts are of different types. They can be cold or hot. The variations are due to the differences in the temperature. The cold desert is known as the Gobi desert and the hot desert is known as the thar and Sahara desert. The hot deserts have high temperatures, evaporation rates, sand storms and dunes. They have a cold night and hot days with a temperature around 50 degrees Celsius. The rainfall occurs and passes into the deeper areas and gets evaporated. So, there is always a shortage of water. The flora and fauna are not abundant. They are scanty. The cold deserts have low temperatures, evaporation rates, sand storms and dunes. They have a hot night and cold days. The plants are short lived and the insects occur in the rainy season. For example, the boeerhavia of Sahara desert has a life span of 14 days. Some of the plants live for half a year as they can live without the water. It includes the hardy grasses. The succulents have the ability to store water and can open their stomata in the night. It includes the cacti mainly. There are few non succulent plants which can survive in the desert. They can survive so as they have the ability to spread their roots. They have a thick bark and wooly covering. It includes the acacia and tamarix. A majority of the animals live in burrows and in the other areas. The animals which occur in the desert are rats, locusts, wasps, snakes, lizards, swifts, seed and the insect eating animals, hares, jackals and foxes. The camel is the only animal which can survive under these tough conditions. Their cells have the ability to withstand the water loss of around 40 percent and the human cells have the ability to withstand the water loss of less than 15 percent. If it is more this can lead to the death of an organism. The feet of camel are insulated and spreading type. The desert kangaroo rat is the other unique mammal which does not take water. It acts on the dry seeds. The source of water produced is in the process of respiration. The other source of water is in their diet.