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micronutrient
Yes
Macro nutrient because it's essential for the growth of the bacteria!
Phosphorous is a macronutrient.
NO
Cobalt is a nutrient because it is necessary to human life; it is called a micronutrient because the necessary amount of it is very small, compared with the total mass of an average diet.
Iron is part of the hemoglobin that transports oxygen in red blood cells. Iron is also found in many other oxygen transport molecules and enzymes that are involved in extracting energy from the foods you eat.
micrp
Phosphorous is a macronutrient.
toilet and pauty
calcium
A micro-nutrient is a nutrient that is necessary for proper function but you only need in small quantities. For example iodine or zinc. A macro-nutrient is something you need in mass quantities. For example, glucose or proteins.