| (i) The morphological changes are indicative of certain element deficiencies and are called deficiency symptoms. |
| (ii) The part of plants that show the deficiency symptoms depend on the mobility of the element in the plant. |
| (iii) Deficiency symptoms appear first in the young tissues whenever the element are relatively mobile. |
| (iv) The deficiency symptoms of Cl, Zn, N, O, are visible first in the senescent leaves. |
A) (iii) and (iv)
B) (i) and (iii)
C) (i) and (iv)
D) (ii) and (iv)
Correct Answer: A
Solution :
[a] The deficiency symptoms tend to appear first in the young tissues whenever the elements are relatively immobile and are not transported out the mature organs, for example, elements like sulphur and calcium are a part of the structural component of the cell and hence are not easily released. The deficiency symptoms of nitrogen, potassium and magnesium are visible first in the senescent leaves.
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