In these choices, the correct option would be 2 pyruvate molecules per glucose.
In the process of glycolysis, it breaks down glucose molecules and thereby produces 2 ATP, 2 NADH, and 2 pyruvate molecules.
Coal was the driving force behind 1800s culture
Primary succession is when, for example, a volcano explodes and there is nothing left and even the soil is ruined. It would take at least a hundred years for the land to be like it was before the volcano erupted. Secondary succession is when, for example, a wild fire happens but the soil is not ruined. It would take at least 25-50 years for the land to be like it was before the fire.