HUMAN NUTRITION

Detailed explanation-1: -Exact needs vary among species, but commonly required plant trace elements include copper, boron, zinc, manganese, and molybdenum. Animals also require manganese, iodine, and cobalt.

Detailed explanation-2: -Some trace elements are essential for living things-they are called micronutrients. The most familiar micronutrients probably are iron, manganese, zinc, copper, and iodine, but there are others. Trace elements are important in water quality.

Detailed explanation-3: -Only eight trace elements are generally accepted as being essential for health and wellbeing in higher animals through the consumption of food and beverages; these are cobalt, copper, iodine, iron, manganese, molybdenum, selenium, and zinc.

Detailed explanation-4: -Trace elements (or trace metals) are minerals present in living tissues in small amounts. Some of them are known to be nutritionally essential, others may be essential (although the evidence is only suggestive or incomplete), and the remainder are considered to be nonessential.