a) Name the mineral elements needed by (i) bones, (ii) red blood cells, (iii) the thyroid gland
b) Which of these elements is (i) present in milk, (b) lacking in milk?
a) (i) Bones require calcium, (ii) red blood cells require iron, (iii) the thyroid gland requires iodine.
b) (i) Milk have calcium, (ii) milk is deficient in iron.