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.
Summer temperatures in Egypt in the Sahara Desert can reach over 50Â°C (122Â°F), but winter temperatures in the desert drop to an average of 15Â°C (59Â°F). Egypt has a number of higher altitude areas in the Sahara Desert.