Question 25 of 56
Q.Horseshoe shaped stele is present in:
(a) T.S. of Selaginella root
(b) T.S. of Selaginella stem
(c) T.S. of Adiantum petiole
(d) T.S. of Adiantum rhizome
Tamil Nadu DgeTamil Nadu HSC First Year (DGE) Board 2019MCQ· 1mImportance★★★★★
45% · 25/56 Questions
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Start your 14-day free trial to unlock the full solution →A horseshoe (U/omega)-shaped stele is the characteristic vascular pattern seen in a transverse section of the Adiantum petiole (rachis).
Different pteridophyte organs show characteristic, diagnostic stelar (vascular strand) shapes in transverse section, which is why anatomy of representative genera like Selaginella and Adiantum is studied:
- Selaginella root — shows a simple protostele (typically a diarch/monarch solid xylem core), not horseshoe-shaped.
- Selaginella stem — shows a plectostele, where the xylem is broken into a number of separate plate-like strands, again not a single horseshoe shape. …
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