Oxygen is referred to as a macronutrient because it is
A. availability of oxygen
B. required in relatively large quantities
C. generated by the plants during photosynthesis
D. required in various physiological processes
Answer:B
Oxygen is referred to as a macronutrient because it is
A. availability of oxygen B. required in relatively large quantities C. generated by the plants during photosynthesis D. required in various physiological processes