Fern plants. Like all other vascular plants, the diploid sporophyte is the dominant phase or generation in the life cycle. The gametophytes of ferns, however, are very different from those of seed plants. They are free-living and resemble liverworts, whereas those of seed plants develop within the spore wall and are dependent on the parent sporophyte for their nutrition. A fern gametophyte typically consists of: Ferns first appear in the fossil record in the early Carboniferous period. By the Triassic, the first evidence of ferns related to several modern families appeared. The great fern radiation occurred in the late Cretaceous, when
Generation gap occurs within families in which different generations speak different primary languages. In order to find a means to communicate within the household environment, many have taken up the practice of language brokering, which refers to the "interpretation and translation performed in everyday situations by bilinguals who have had no special training". In immigrant families where the first generation speaks primarily in their native tongue, the second generation primarily in the language of the country in which they now live while still retaining fluency in their parent's dominant language, and the third generation primarily in the language of the country they