Final answer:
The structure responsible for reproduction in fungi is the spore. Spores are reproductive cells produced in large numbers by fungi that can germinate to form new fungi.
Step-by-step explanation:
The structure in fungi responsible for reproduction is the spore. Spores are tiny reproductive cells that are produced in large numbers by fungi. They serve as a means of dispersal and can germinate to form new fungi under favorable conditions. Spores can be produced asexually or sexually depending on the fungus. Asexual spores are produced by mitosis, while sexual spores are produced through the process of meiosis and fusion of gametes.
Learn more about Reproduction in fungi