How will you differentiate an ascus from a basidium.

Explanation

The main differences between an ascus and a basidium are - (i) Ascus is formed in Ascomycetes whereas basidia are formed in basidiomycetes. (ii) Ascus encloses 8 (sometimes less or more) ascospores which are borne endogenously. The basidium produces 4 basidiospores which are borne exogenously. (iii) The basidiospores are attached to basidia by means of sterigma whereas ascospores are filled inside the ascus.