The asnswer is 2DG also known as 2-Deoxy-D-glucose. 2DG is a glucose molecule that has the
2-hydroxyl group replaced by hydrogen, so that it cannot undergo further
glycolysis. As such; it acts to competitively inhibit the production of
glucose-6-phosphate from glucose at the phosphoglucoisomerase level (step 2 of
glycolysis).
Probably because of history relation.
Photosynthetis, burning of fossil fuels, plant respiration.
Through leaching. B horizons or subsoil get materials from above through accumulated rain water that leached these materials and precipitated it into the B horizon.
