question_answer

                                Ectophloic siphonostele is found in:                                                                                                        

A)                 Adiantum and Cucurbitaceae    

B)                 Osmunda and Equisetum

C)                 Marsilea and Botiychium                             

D)                 Dicksonia and maiden hair fern

Correct Answer: B

Solution :

                In the ectophloic siphonostele the xylem surrounds pith and this xylem is surrounded by phloem, pericycle     and endoderm is respectively.                 e. g., Osmunda and Equisetum.