7. How are the male gametes
of gymnosperms formed?
What is the relationship
between the pollen grains and
the concep of alternation of
generations?

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In the male strobiles () there are
microsporophylls (fertile of the
strobile) that microsporangia.
Within the microsporagium
mother cells undergo meiosis
generate haploid microspores. The
wall develops into wing
projections (to facilitateits aerial
) and mitosis occurs
producing cells, the generative cell
the tube cell. The structure
containing these elements the pollen
grain.

The grain relates to the
of generations since it the
male gametophyte (the stage of
the life ).