Question

Actinostele is a modification of
A) Siphonostele
B) Dictyostele
C) Protostele
D) Solenostele

Answer 1

The answer to your question is A

Answer 2

Actinostele is a modification of C) Protostele.

Stele is the central part of the stems and roots of vascular plants. Protostele is an arrangement of conducting vascular tissues found among some lower plants where a solid cylinder of xylem is surrounded by a layer of phloem.

It is considered to be a very basic and primitive arrangement of vasculature. Actinostele is a modified protostele where the central vascular bundles are lobed. They are typically with an exarch arrangement.

Example: Lycopodium