Deficiency of ___________ causes yellowing in plants?
Correct answer: A. Magnesium
- A. Magnesium
- B. Iron
- C. Chlorine
- D. Oxygen
Explanation
Magnesium is part of the chlorophyll molecule, so its deficiency reduces chlorophyll formation and produces yellowing, called chlorosis, especially in older leaves. Iron deficiency can also cause chlorosis, so option b may be chosen, but magnesium is the mineral directly present at the centre of chlorophyll.
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