Almost 99% of the mass of the human body is made up of six elements: oxygen, carbon, hydrogen, nitrogen, calcium, and phosphorus. Only about 0.85% is composed of another five elements: potassium, sulfur, sodium, chlorine, and magnesium. All 11 are necessary for life.
False. Because, for example, when the organisms are shortage of food, they will all compete to get food. So the answer is false. They do indeed compete for for resources.
