BUILDING BLOCKS. Overview. Macromolecules form when smaller molecules (building blocks or subunits) come together. Monomers are joined by covalent bonds to form polymers.
The coldest temperature in the Sahara desert is 36 degrees. Well, it depends on where in the desert, but it can reach below freezing. Its colder nearer to the ocean and warmer towards the center of the desert.
Hot and Dry Deserts temperature ranges from 20 to 25Â° C. The extreme maximum temperature for Hot Desert ranges from 43.5 to 49Â° C. Cold Deserts temperature in winter ranges from -2 to 4Â° C and in the summer 21 to 26Â° C a year. The precipitation in Hot and Dry Deserts and the precipitation in Cold Deserts is different. Hot and Dry Deserts usually have very little rainfall and/or concentrated rainfall in short periods between long rainless periods. This averages out to under 15 cm a year.