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Question

Citrus thorn/spine is actually modification of

A
Stem
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B
Branch
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C
Leaf
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D
Stipule
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Solution

The correct option is A Branch
B. Stem
Reason: Thorn is a hard, straight, and pointed structure found in some plants. It not only decreases the rate of transpiration, but also acts plays a defensive role against herbivores. Thorns can be modified from different plant parts like axillary buds, stems etc. In Citrus it is a modified stem.

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