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Which macronutrient is described as important to the photosynthetic process?

ASodium
BMagnesium
CChlorine
DNickel
Answer & Solution
Correct answer: B. Magnesium
1. Magnesium and calcium are both listed as important macronutrients. 2. Magnesium is the one described as important to the photosynthetic process. 3. Sodium, chlorine and nickel are all micronutrients, present only in very small quantities. 4. So the answer has to be the macronutrient of the four, which is magnesium. _Source: OpenStax Biology (1st ed., CC BY 4.0), Ch 31 "Soil and Plant Nutrition", section 31.1 Nutritional Requirements of Plants_
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