Practice question

Alternation generations pattern haplodiplontic diplobiontic shows multicellular sporophyte diploid phase producing spores via meiosis in sporangia alternating with gametophyte haploid phase producing gametes via mitosis in gametangia. In seed plants sporophyte tremendously dominant forming tree shrub herb providing photosynthesis structural support, while gametophytes microscopic ephemeral embedded within sporophyte tissues within flower cone. Bryophytes situation reversed gametophyte dominant photosynthetic leafy thallose, sporophyte dependent short-lived, pteridophytes both independent but sporophyte larger leafy, protonema filamentous juvenile gametophyte of mosses, embryo diploid early sporophyte, thus dominant phase remains sporophyte illustrating vascular complexity increase.