Question 29
Photosynthesis and Plant NutritionWhich 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 ions
Show the answer and explanation
Answer: D (Magnesium ions)
Explanation
Magnesium is part of the chlorophyll molecule and must be absorbed from the soil; carbon comes from the air.