Answer:
The correct answer will be- sac like structure called ascus.
Step-by-step explanation:
Ascomycota is the largest division of the fungi with about 64000 species which reproduces by both the ways of reproduction.
The ascomycetes are named so because of their sac-like microscopic structure called ascus formed during the sexual reproductive phase of the fungi. A single ascus produces eight ascospores through meiosis under optimal conditions which form the fungi.
Thus, sac-like structure called ascus is the correct.