The wars of Alexander the Great were fought by King Alexander III of Macedon (The Great), first against the Achaemenid Persian Empire under Darius III, and then against local chieftains and warlords as far east as Punjab, India.
What are the four most abundant elements found in living systems? There are 4 very abundant elements found in living systems. These 4 abundant elements are oxygen, carbon, hydrogen, and nitrogen.
These elements are found in living things in the form of Water, Glucose, Glycine and Calcium phosphate. The most important combination of elements for all living organisms is water which is made up of hydrogen and oxygen. Another very important compound for living organisms is glucose which constitutes Carbon, oxygen and hydrogen. Nitrogen is an important part of proteins. Water, proteins and glucose are the most important things for living things and all these compounds are made up of elements which reflects their importance.