Botany - Biological Classification Question with Solution | TestHub

The eukaryotic, multicellular, saprophytic organisms are Fungi. Zygospores are formed by fusion of two gametes. It is seen in Phycomycetes. Sexual spores are called ascospores are produced endogenously in sac like asci in Ascomycetes. In Basidiomycetes, plasmogamy is brought about by fusion of two vegetative or somatic cells of different strains or genotypes. The resultant structure is dikaryotic which ultimately gives rise to basidium. Karyogamy and meiosis take place in the basidium producing four basidiospores.

In Phycomycetes, asexual reproduction takes place by zoospores (motile) or by aplanospores (non-motile). These spores are endogeneously produced in sporangium (Sporangiospores). In Ascomycetes, the asexual spores are conidia produced exogenously on the special mycelium called conidiophores.