Seeds of gymnosperms have three generations, that is
Two sporophytic and one gametophytic generation
All three sporophytic generations
All three gametophytic generations
Two gametophytic and one sporophytic
A
Two gametophytic and one sporophytic
B
All three sporophytic generations
C
Two sporophytic and one gametophytic generation
D
All three gametophytic generations
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Solution
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Gymnosperms are group of seed plants that do not produce flowers. However, like all vascular plants they have a sporophyte-dominant life cycle and the relatively short-lived gametophytic phase. While the microspores and megaspores, are typically produced in pollen cones or ovulate cones, Gametophytes develop within the spore wall. Pollen grains (microgametophytes),mature from microspores, and produces sperm cells. Megagametophytes develop from megaspores and are retained within the ovule. They typically produce multiple archegonia. Thus they have two sporophytic and one gametophytic generation.
Hence the correct option is A.
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