MCQs on Gymnosperms - Plant Kingdom mcqs - Frequently Asked

Gymnosperms are naked seeded plants. Gynmosperms are a group of ancient plants. They become dominant in the Jurassic period Most of the gymnosperms are evergreen trees. Some shrubby pl..flas are also found in this group. They have worldwide distribution. They are most abundant in the temperate region. The fossils of gymnosperms are found near coal and oil deposits.
Life cycle
Gymnosperm shows a dear alternation of sporophytic and gametophytic generations. The plant body is sporophytic generation. The gametophytic is very much reduced. It had completely lost independent existence.
Fertilization and seed formation
Pollen tube carries male gametes to egg (oosphere). Fertilization occurs and diploid oospore is formed. Oospore is the beginning of gametophyte generation. The oospore gives rise to the embryo. Prothalial tissues provide nourishment to developing embryo. Integument is transformed into the seed coat. The unutilized prothalial cell becomes endosperm.
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