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simple chemical substances needed by the body in relatively small amounts for normal growth and development. They usually occur in the form of ions.
teeth found at the back of the mouth just in front of the molars in the mammalian jaw, used for...
the clearing of large areas of natural forest, mainly to free up land for agriculture and or...
organic compound that always contains the elements carbon, oxygen and hydrogen. The building...
tough cartilage that acts as a shock absorber between vertebrae and at the ends of bones in ball...