Question

Ectophloic siphonostele is found in [CBSE PMT 2005]
A) Adiantum and Cucurbitaceae
B) Osmunda and Equisetum
C) Marsilea and Botrychium
D) Dicksoni and Maidenhair fern

Answer 1

The Ectophloic siphonostele is found in (B) Osmunda and Equisetum. Ectophloic siphonostele is a monostele version of siphonostele. In this, a circular ring of xylem exists around the pith, and outside of xylem a ring of phloem is observed. It is found in flora section of the ecosystem.