Question

__________ is used by an organism for the biosynthesis of its body constituents such as a skin and blood​

Answer 1

Answer:

Nutrient

Explanation:

Nutrient is that substance which an organism obtains from it's surroundings and uses it as a source of energy or for the biosynthesis of it's body constituents

For example, carbohydrates, fats and proteins are examples of such nutrients. These are organic nutrients. Carbohydrates and fats can be called nutrients, that are used as a source of energy, while proteins are nutrients that are used for the biosynthesis of  body constituents.