If you are interested, mamya, the life cycle of ferns is really unusual. The "ferns" you see are diploid - this means they have two copies of each chromosome. They produce tiny "haploid" spores, containing one copy of each chromosome. These, if they land in suitable places, grow into a sort of "green slime", looking rather like tiny liverworts. These "prothalli" produce cells which fuse together to give diploid "zygotes", which grow into new "ferns". This is called "alternation of generations". Most other organisms alternate between haploid and diploid, but only ferns have recognisable plants in both states. (Of course, if you aren't interested, you don't have to read this!)