An aging population, a high infertility, and a lack of food and water.
Elements emit colours when heated because electrons in atoms can have only certain allowed energies.Heating an atom excites its electrons and they jump to higher energy levels. When the electrons return to lower energy levels, they emit energy in the form of light. Every element has a different number of electrons and a different set of energy levels. Thus, each element emits its own set of colours. See, for example, mercury and neon above. Those colours are as distinctive to each element as fingerprints are to people.
they are both formed from enzymes with form polypeptides which is what protein consists of
You can write things down, read the material out loud, and read and reread your materials until you pretty much memorize it
