The conversion of pyruvic acid to acetyl-coa can be described as because a molecule of co2 is produced as a by-product.

The reaction may be referred to as a decarboxylation reaction. Decarboxylation reactions are those in which carbon dioxide is removed. This reaction in which pyruvic acid is connverted to acetyl coenzyme A is a part of the reactions that take place during the process of respiration. The carbon dioxide released during respiration is produced from such decarboxylation reactions.

It is called a neutralization reaction

The independent variable is the type of music.the dependent variable is the pulse rate.the intervening variable is the age of the subject.if the mother does not like rock, her pulse is likely to not increase.the same might be true for the sister.the friend may like rap and gets excited.to establish cause/effect relationship, all of the subjects must be consistent.hope i .