A) formation of spores
B) formation of antheridia and archegonia
C) formation of gametes
D) germination of spores
Correct Answer: A
Solution :
In the ferns the sexual reproduction takes place through spores which are borned in sporangia. Sporangium is a diploid structure it bears diploid spore mother cells which undergo meiosis and produce haploid spores. Each spore contains an outer thick brown wall called exine and a thin innerwall called intine. Spore is the first cell of gametophyte. On germination, it gives rise to a haploid gametophytic stage.
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