Glycolysis ends in the production of
carbon dioxide
glycogen
pyruvic acid
enzymes

the correct answer for the fill in the blank is Pyruvic acid.

Glycolysis is a metabolic process, which includes the breakdown of glucose ( a simple sugar) into 2 molecules of pyruvate ( a two carbon containing compound) or pyruvic acid with the formation of net 2 ATP and 2 NADH.

It is therefore a pathway for extracting energy from glucose. It occurs in the cytoplasm of all living cells.

Thus, glycolysis ends in the production of pyruvic acid.

c.more precipitation,but only when emission levels.

i would say it is