Thallophytes have dominant gametophytic generation i.e., the presence of haploid individuals. In zygotic meiosis, meiotic division occurs in zygote resulting in the formation of haploid individuals. In thallophytes, haploid plant body is not differentiated into root, stem and leaves. Other options: Option A: In the case of prokaryotes, there is no meiosis as there is a lack of sexual reproduction. Option C: In the case of bryophytes, sporic meiosis occurs which gives rise to spore but not gametes. Haploid spores develop haploid individuals. Option D: In the case of Spermatophyta (gymnosperm and angiosperms) gametic meiosis is seen. In this, meiosis occurs during gamete formation. It results in the formation of haploid gametes which fuse during fertilization and form diploid zygote having a diplontic life cycle.