Organisms need nutrients in order to A. utilize hydrogen and oxygen B. recycle chemical compounds C. carry out essential life functions D. carry out nitrogen fixation   2. Biogeochemical cycling ensures that A. human activity will have no effect on elements B. living organisms will not become limited in any one nutrient C. nutrients will be circulated throughout the biosphere D. many nutrients will not reach toxic   3. Which of the following choices is benefit of human technology that positively impacts the environment? A. ability to travel long distances B. ability to make new products from used materials C. capacity to produce large quantities of food D. ability to live comfortable in large homes

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Modes of Nutrition

It is a biological process of providing or obtaining food that is necessary for growth and health. It includes many physiological processes - absorption, ingestion, assimilation, catabolism, excretion, etc. In biology, the science that deals with nutrition's physiological and chemical processes are called "nutritional science."