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.
1 World population distribution. 2  The Sahara desert is sparsely populated. 3  With constantly hot temperatures (+40C) during the day, and very little rainfall (1mm a year at Aswan in Egypt) the Saharaâs climate is difficult for people to live with. The Sahara desert is sparsely populated. 2  With constantly hot temperatures (+40C) during the day, and very little rainfall (1mm a year at Aswan in Egypt) the Saharaâs climate is difficult for people to live with.