Each question worth 2 points. Nitrate nitrogen fertilizer inhibits nodulation. Ammonia nitrogen fertilizer is needed for nodulation. Bacteriods contain nitrogenase, the enzyme that assimilates N 2 . Cations are more readily taken up than the same ion in chelated form.
Anions are more attracted to the root surface than cations.
Water logged soils may cause Ca deficiency. Dry soils may cause Ca deficiency. Each numbered question worth 5 points. Phospholipids are the main component of the plasmalema and the tonoplast. Lack of P means weaker membranes that are much more subject to breakdown and the contents of the cell leak into the apoplasm and the leaves thus appear water soaked.