Elements essentially required for growth of all plants species are___________________?
Correct answer: C. 16
- A. 32
- B. 15
- C. 16
- D. 3
Explanation
The traditional list recognizes 16 essential elements for plant growth, including carbon, hydrogen, oxygen, the primary and secondary nutrients, and micronutrients. Modern references may add nickel, making 17, but the submitted options use the traditional 16-element list.
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