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Author Question: Trace elements are those required by an organism in only minute quantities. Whic (Read 1563 times)

Hawke

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on: May 25, 2013
Trace elements are those required by an organism in only minute quantities. Which of the following is a trace element that is required by humans and other vertebrates, but not by other organisms such as bacteria or plants?
A) nitrogen
B) calcium
C) iodine
D) sodium
E) phosphorus


Melanie

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Reply #1 on: May 28, 2013


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