Out of 92 naturally occurring chemical elements how many are considered as bio-elements?
Correct answer: B. 16
- A. 6
- B. 16
- C. 26
- D. 15
Explanation
Although many elements occur naturally, only about 16 are regarded as bio-elements because they are essential components of living matter and support cellular structure or metabolism. Students may choose 6, confusing the major elements with the complete list of essential bio-elements.
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