Question

The middle sterile portion in the capsule of moss is

• A. Spore sac
• B. Protonema
• C. Columella
• D. Apophysis

Answer 1

The correct option is C Columella

Columella is the central pith-like cylindrical portion of the theca, composed of parenchyma cells. The distal cone-shaped end of the columella projects into the concavity of the operculum and at the basal constricted end it is connected with the apophysis. It is a sterile tissue that provides water and nutrients, required for the development of spores in the spore sac.

So, the correct answer is 'Columella"