The apple pudding which is prepared by the combination of the sugar, apples, lemon juice, and butter belongs to the category of mixture. Since, multiple substances are included in the apple pudding recipe, it falls under the category of elements. A mixture can be defined as the substance which is formed by the mixing of the two or more than two substances. A compound can be defined as anything which is composed of two or more than two elements. . On the other hand, an element can be defined as the substance which have the same atoms present in it. Atom is the smallest constituent having chemical properties. and a group of atoms is known as molecules. Hence, an apple pudding is a mixture.
Explanation:
Amino acids are the building blocks of proteins. Proteins are digested in the gastrointestinal tract into peptides,polypeptides and single amino acids using hydrochloric acid and proteases. After protein digestion amino acids are absorbed by the jejunum in the small intestines and taken up by capillaries to the blood stream. They then travel in the blood to the liver, joins the urea cycle where they are metabolised for cell growth and tissue repairs.
The phospholipid no later regulates the amount of water that travels in and out of the cell.
Vitamins play a vital role in helping the chemical reactions of the body to occur, besides being important for overall well-being, growth, and development of the body. They help in building the parts of the body like teeth, muscles, and also help in absorbing certain important elements like iron etc.
I may be wrong but, I would say the variable is the color of the light. At least that is what it sounds like to me.