What name is given to the sac-like spore-bearing structure of some fungi?

The sac-like spore-bearing structure of some fungi is known as an ascus. This specialized structure is a key component of the reproductive process in sac fungi, or Ascomycetes. During sexual reproduction, the ascus typically contains eight ascospores, which are released when the ascus matures and ruptures. This method of reproduction is significant in ensuring genetic diversity among the fungal population.

In contrast, other terms refer to different structures or aspects of fungi. For example, basidiocarp refers to the fruiting body of basidiomycete fungi, such as mushrooms, where basidiospores are formed. A sorus is often found in ferns and relates to spore clusters rather than fungal structures. Carpium is not a widely recognized term associated with fungal reproduction or morphology. Therefore, the distinct functions and characteristics of these structures clarify why the ascus is specifically defined and recognized in the context of spore-bearing in fungi.