Q. Ectophloic siphonostele is found in :
A) Adiantum and Cucurbitaceae
B) Osmunda and Equisetum
C) Marsilea and Botrychium
D) Dicksonia and maiden hair fern
Explanation
[Solution from source] An ectophloic siphonostele has a pith with phloem only outside the xylem ring; it is found in Osmunda and Equisetum. Adiantum (maidenhair fern), Marsilea and Dicksonia have amphiphloic stelar types, with phloem on both sides of the xylem. Answer (2).
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.