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Nutrition › ViewIron, a mineral, is needed for what?
A. bones and teeth
B. energy
C. cell chemistry
D. healthy blood
Bonding and the Periodic Table › View
What 5 elements make up your DNA?
A. Hydrogen, Nitrogen, Bromine, Phosphorus and Carbon
B. Nitrogen, Bromine, Phosphorus, Carbon and Oxygen
C. Oxygen, Nitrogen, Carbon, Phosphorus and Hydrogen
D. Hydrogen, Nitrogen, Phosphorus, Carbon and Osmium