Trace elements are required by organisms in only minute quantities (less than 0.01% of mass).Which of the following is a trace element that is required by humans and other vertebrates?

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Quizplus · Accepted Answer

Iodine is a trace element that is required by humans and other vertebrates, specifically for the production of thyroid hormones. Nitrogen, calcium, potassium, and phosphorus are all essential elements, but they are not considered trace elements as they are required in much larger quantities (at least 0.01% of mass).

Trace Elements Are Required by Organisms in Only Minute Quantities