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Question

The pitcher of Nepenthes (pitcher plant) is a modified

A
leaf base
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B
leaf blade
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C
petiole
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D
stipules
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Solution

The correct option is B leaf blade
The leaf blade or lamina gets modified into a pitcher like structure in Nepenthes. The plant has a pitcher to trap insects. These plants live in nitrogen deficient soils and fulfill their nitrogen requirements from the insects.

Leaf base is of two types - pulvinus (leguminous plants) and sheathing (monocots). It is not modified for any other function.

Petiole is modified to form phyllode in Australian Acacia.

Stipules are two lateral leaf-like structures present on either side of the leaf base. They are modified to form tendrils in Smilax.

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