Question:

Most of the macronutrients function as?

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a. food for plants

b. structural components for cells.

c. elements needed for the development of mycorrhizae

d. enzyme activators

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  1. a. food for plants

    Macronutrients are defined in several different ways.

    * The chemical elements humans consume in the largest quantities are carbon, hydrogen, nitrogen, oxygen, phosphorus, and sulfur.

    * The classes of chemical compounds humans consume in the largest quantities and which provide bulk energy are carbohydrates, proteins, and fats. Water and atmospheric oxygen also must be consumed in large quantities, but are not always considered "food" or "nutrients".

    * Calcium, salt (sodium and chloride), magnesium, and potassium (along with phosphorus and sulfur) are sometimes added to the list of macronutrients because they are required in relatively large quantities compared to other vitamins and minerals. They are sometimes referred to as the macrominerals.

    The remaining vitamins, minerals, or elements, are called micronutrients because they are required in relatively small quantities.

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