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Explain the need for nutrition by living organisms.
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- Words:
- 4444
- Submitted:
- Wed Oct 15 2003
... BIOLOGY ASSIGNMENT 1) EXPLAIN THE NEED FOR NUTRITION BY LIVING ORGANISMS. Nutrition is the science of how our bodies obtain energy, build tissue, and control body functions using materials supplied in the food we eat. Nutrients are chemical substances needed by the body. The need for nutrition by living organisms is essential for survival in the sense that it provides energy and material for growth and repair and for the general function of the human system and its maintenance. Different foods we eat contain at least one of the seven major nutrients namely; carbohydrate, protein, fats, vitamins, minerals, roughages and water. There are two types of nutrition Heterotrops and Autotrops - We are unable to make our own food from the sun as plants do. We get our food by eating plants or other animals. Our bodies need food for a variety of reasons: Growth: Food, especially proteins, makes new cells and tissues
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