10. How are the gymnosperm
seeds formed? What are the
ploidies of the structures that
compose the seeds?

Gap-fill exercise

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Their seeds are formed
differentiation of the megasporangia
the female strobiles (cones). an
oosphere is fecundated female
gametophyte originates the (n)
primary endosperm (nutritive
that covers the embryo) the
covering of the turns
into the diploid () seed shell.