An obligate parasite, or holoparasite, is a parasitic organism that cannot complete its life-cycle without exploiting a suitable host.
Part of the Andes mountain range, Aconcagua is the second highest of the Seven Summits, behind only Mount Everest in Asia. At 22,837 feet (6,961 meters), not only is it the highest mountain in South America, it is the tallest peak in all of the Americas as well as the Southern and Western Hemispheres.
Mount Aconcagua is the highest mountain on the South American continent. Its summit is 22,834 feet (6,960 meters) above sea level. It is located in Argentina. Image of Mount Aconcagua copyright by iStockPhoto and Cristian Lazzari.