Question 17 of 20 :
Select the best answer for the question.
17. Why do plants need magnesium?
O A. Magnesium is a component of chlorophyll.
B. Plants can't function or use other nutrients without it.
O C. Plants need magnesium for root growth.
O D. It's a macronutrient.
O Mark for review (Will be highlighted on the review page)
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