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.
The Sahara is the largest desert is the hottest places in the world which runs through 11 countries, occupying ten percent of the African Continent. September, 1922, the temperature in the Sahara soared to 136 degrees F.