During which stage of cellular respiration is glucose broken down into two molecules of pyruvic acid?

Which technically is nasa developing that will astronauts reach mars

Identify any four organelles that should be present in the eukaryotic organism and describe the function of each organelle

During the winter, this species of fox has white fur, but in the summer, it has brown fur. what environmental change may have lead to this fox's fur color? snow cover increase in sun's brightness volcanic eruption global warming