WAEC Biology 2012 Objective — Question 29
Question 29 of 60 from the West African Examinations Council (WAEC) Biology 2012 Objective paper, with the correct answer and a full explanation.
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Which of the following substances must be present in the soil for growth of a healthy green plant?
- A. Amino acids
- B. Carbon
- C. Glucose salts
- D. Magnesium ionsCorrect
Explanation
A plant can only be green if it has sufficient chlorophyll. The elements required for chlorophyll formation include magnesium, iron and nitrogen.
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