Ans. Fungi can be classified into three major groups based on their reproductive structures: Ascomycetes (sac fungi), Basidiomycetes (club fungi), and Zygomycetes. Ascomycetes and Basidiomycetes produce sexual spores in specialized structures called ascocarps and basidiocarps, respectively. Zygomycetes produce zygospores that result from the fusion of two haploid hyphae.