A) bristles
B) thorn
C) prickle
D) spine
Correct Answer: B
Solution :
In same plants, stem is modified into stiff, pointed, unbranched or branched structures, thorns which sometimes have leaves, flowers, eg, Aeglemarmelos (bel), Citrus (lemon), Punicagranatum (pomegranate), Ulex, Duranta, Carissa, etc. They perform defensive function. Thorns are actually modified axillary buds or terminal buds and they possess vascular supply.
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