बच्चों का क्या प्राइस चल रहा है मार्केट में कच्चे कच्चे कच्चे
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इसी तरह कच्चे तेल का अप्रैल ... बढ़त के साथ 3,758 रुपये प्रति बैरल रहा.
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Cheater.
➡ They are needed in very small amounts.
➡ They include iron, manganese, copper, molybdenum, zinc, boron, chlorine and nickel.
➡ Essential elements are also grouped into four categories on the basis of their functions. They are:-
◼ Components of biomolecules and structural elements of cells.
E.g. Carbon, Hydrogen, Oxygen,
Nitrogen.
◼ Components of energy-related chemical compounds .
E.g. Mg in chlorophyll and phosphorous in ATP.
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