Manganese functions in

(1) Splitting of water to liberate oxygen

(2) Transfer of electrones through z scheme

(3) Cyclic Phosphorespiration

(4) Photorespiration

(1) Zn++

(2) Cl-

(3) Ca++

(4) Mn+

(1) Cupric form

(2) Cuprous form

(3) CuO

(4) Cu

(1) Cu⁺⁺

(2) Fe⁺⁺

(3) Cu⁺

(4) Cl^-

(1) B

(2) Cl^-

(3) Mo

(4) Cu

1. Membrane functioning, utilization of Ca++

2. Pollen germination, uptake of Ca++

3. Cell elongation, catalase activation

4. Cell differentiation, carbohydrate translocation

(1) Nitrogenase

(2) Nitrate Reductase

(3) Catalase

(4) Both 1 and 2

(1) Na+

(2) K+

(3) Cl-

(4) Mo++

(1) Cl-

(2) Mn++

(3) Cu

(4) Both A and C

(1) Any element below which plant growth is retarded but reproduction is not compromised.

(2) Essential element below which plant growth is retarded.

(3) Beneficial elements below which plant growth is retarded.

(4) Beneficial elements above which plant growth is retarded.