essential nutrient
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No, vitamins are by definition an essential nutrient that cannot be made by the body in sufficient quantities. Vitamin D is not really a vitamin. The human body can produce this nutrient and it is actually a hormone, not a vitamin.
Illness caused by lack of sufficient amount of a nutrient is called "malnutrition".
"Essential nutrients" are unable to be synthesized internally (either at all, or in sufficient quantities), and so must be consumed by an organism from its environment.http://en.wikipedia.org/wiki/Nutrient#Essential_and_non-essential_nutrients
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Earthworm poop is called castings or vermicast. It is a nutrient-rich fertilizer produced by earthworms as they digest organic matter in the soil.
A metallic mineral, which contains sufficient quantities of the metal, so that the metal can be extracted efficiently, is called an ore. However, ores can also refer to minerals from which non-metallic substances can be extracted.
The quotient of two quantities called a ratio.
All other quantities which described in terms of base quantities are called base quantities.
What is called a statement of comparing of two or more different quantities
It received it's rich silt from the Indus River. When it flooded it produced an nutrient enriched mud called silt that was good for farming and agriculture in the Indus River Valley.
It is called a limiting nutrient
It is called a limiting nutrient