Solution:
Archegonia are multicellular female sex organs with jacket seen in Bryophytes, Pteridophytes and Gymnosperms. They are absent in Algae and Angiosperms. Pinus is a gymnosperm and Funaria is a bryophyte and hence they have archegonia. Since Dictyota and Spirogyra are algae and Eucalyptus is an angiosperm they do not have archegonia.
