(i) Helps in formation of middle lamella. |
(ii) Needed in mitotic spindle formation. |
(iii) Accumulates in older leaves. |
(iv) Involves in normal functioning of the cell membranes. |
(v) Activate certain enzymes. |
(vi) Plays an important role in regulating metabolic activities. |
A) \[{{K}^{+}}\]
B) \[F{{e}^{3+}}\]
C) \[N{{O}^{3-}}\]
D) \[C{{a}^{2+}}\]
Correct Answer: D
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