BotanyA tobacco plant growing in magnesium deficient soils shows 

A tobacco plant growing in magnesium deficient soils shows 

  1. A

    chlorosis of upper leaves only

  2. B

    necrosis of lower leaves only

  3. C

    chlorosis and necrosis of basal leaves of stem

  4. D

    chlorosis and necrosis of leaves nearer to shoot apex

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    Solution:

    Magnesium is a mobile element. Its deficiency causes necrosis and chlorosis. Hence both necrosis and chlorosis of basal leaves are seen in such plants. 

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