A biologist is in the process of classifying a newly discovered fungus. The fungus is a decomposer and has saclike structures. The organism most likely belongs in the same group as which of these?

Fungi with saclike structures are ascomycetes, which produce spores in saclike structures called asci. Penicillium, the fungus used to make some blue cheeses, is an ascomycete. Bread molds and rusts belong to other fungal groups, and fungi are heterotrophs rather than autotrophs.

AI-written and checked against the verified answer.