Question

question 12 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 all organisms? iron calcium carbon sodium potassium

Explanation:

Trace elements are required by organisms in only minute quantities (less than 0.01% of mass). Iron is a trace - element. Calcium, carbon, sodium, and potassium are required in larger amounts and are not trace - elements.

Answer:

iron