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Biology, Chap#8 Nutrition

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Chapter : 8 Nutrition Q 1- Define nutrients and its types. Nutrients : These materials (elements and compounds) that organisms obtain and use for maintaining life are called nutrients. Examples : 1. Elements: Iron, magnesium, nitrogen, calcium etc. 2. Compounds: Proteins, carbohydrates, fats etc. Types : There are two types of nutrients on the basis of the quantity needed by organisms. 1. Micronutrients: The nutrients which are required in small amount are known as micronutrients. Examples: Zinc, sodium, boron etc. 2. Macronutrients: Those nutrients which are required in large amounts are known as macronutrients. Examples: Carbon, oxygen, calcium etc. Importance of Nutrients : 1. Keep our body warm 2. Build our repair tissues 3. Maintain a heartbeat 4. Help us avoid certain diseases 5. Recover faster from illness 6. Source of energy. Q 2: Explain mineral nutrition in plants with reference of micronutrients and macronutrients. Nutrition : The process in which organisms obtain essential materials for making food or take food made by others, and convert it into energy to be used for different functions is called nutrition. Mineral Nutrition in Plants : The processes which deal with how plants get minerals and where they use them is called mineral nutrition in plants. Soil is the store house of these minerals. Types of Nutrients: On the basis of quantity needed by the plants, nutrients are classified into two types. 1. Micronutrients : The mineral elements which are required ...
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