Question 25
Photosynthesis and Plant NutritionWhich of the following groups contains only macro-nutrients?
- A.phosphorus, nitrogen and molybdenum
- B.manganese, copper and zinc
- C.boron, sulphur and iron
- D.calcium, magnesium and potassium
Show the answer and explanation
Answer: D (calcium, magnesium and potassium)
Explanation
Calcium, magnesium and potassium are all needed in large amounts. Molybdenum, manganese, copper, zinc, boron and iron are micro-nutrients.