Inactive forms of vitamins that the physique can convert into lively usable forms. Also referred to as vitamin precursors.
<h3>What are energetic varieties of vitamins?</h3>
Infections and fevers make bigger the requirement for vitamin A. Three extraordinary types of vitamin A are lively in the body: retinol, retinal, and retinoic acid. These are known as retinoids. The cells of the physique can convert retinol and retinal to the other lively varieties of diet A as needed.
<h3>What's A precursor vitamin?</h3>
The time period "precursor" is applied to an inactive substance transformed to an energetic one (such as an enzyme, vitamin, or hormone). The time period "precursor" applies to any chemical that is modified into another.
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The black hand was a secret serbian society that used terrorist methods to promote the liberation of Serbs outside Serbia from Habsburg or Ottoman rule and was instrumental in planning the assassination of the Austrian archduke Franz Ferdinand, <span>precipitating the outbreak of </span>World War 1.
So based on that I believe the answer is, A.
Answer:
Social classes
Explanation:
The social classes are a class of people that reside around and whose attitudes are largely dependent on their jobs, status in the society, wealth, education and the way people perceive and do things. So these are the things that constitutes to behavior of a class of person and we judge on this measurement scale. This population who have similar portion of objectives, attittudes, values, norms are a segment of population and known as a social class.
Answer:It is a problem for many people in the world because large bodies of wages like ocean water are hard to filter and make drinkable. Also, some places in the would are very dry and don’t get enough precipitation. Lastly, It cost a lot of money to build water pumps to supply people with water.
Explanation:
