Explain why two 16 year-old males of the same weight might need different amounts of energy.
(ii) Which two types of nutrient provide most of the energy in our diet?
(b) (i) Calculate the difference in the recommended daily intake of calcium for a 15 year-old male and a 30 year-old male.
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Explain why two 16 year-old males of the same weight might need different amounts of energy.
(ii) W...
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