Thorn of Bongainvillea is modified

Stem

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Leaf

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Floral bud

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Root

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Solution

The correct option is A Stem
A. Stem
Reason: Thorn is a hard, straight, and pointed structure. This is is generally used as defence mechanism or or as climbing accessories in plants. In Bougainvillea and Duranta, thorns are modified from the axillary bud which is the part of stem. Thus, the correct option is A.

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