Botany - Plant Kingdom Question with Solution | TestHub

The leaves in Pteridophyta are small (microphylls) as inSelaginella or large (macrophylls) as in ferns. The sporophytes bear sporangia that are subtended by leaf-like appendages called sporophylls. In some cases, sporophylls may form distinct compact structures called strobili or cones. The sporangia produce spores by meiosis in spore mother cells. The spores germinate to give rise to inconspicuous, small but multicellular, free-living, mostly photosynthetic thalloid gametophytes called prothallus.
Heterospory is observed as both small and large spores are produced.