Question

Which of the following group of plants shows dominant phase of haploid gametophytic generation?
I. Angiosperms
II. Gymnosperms
III. Horsetails, ferns, club mosses (lycophytes and pteridophytes)
IV. True mosses, liverworts, and hornworts (bryophtyes)

• A. I only
• B. I and II
• C. I, II, and III
• D. III and IV
• E. IV only

Answer 1

The correct option is E IV only

During the life cycle, plants go through both haploid and diploid generations. referred to as alternation of generations. The diploid plant structure is the sporophyte which produces spores through meiosis. These spores form haploid structure, the gametophyte, which give rise to the haploid gametes. However, during the occurrence of alternation of generation, the dominant generation differs between the plants. While the dominant generation in case of bryophytes (mosses and liverworts) is haploid, with the gametophyte being the main plant, in tracheophytes (vascular plants), the diploid generation is dominant and the sporophyte makes up the main plant.

So, the correct answer is option E.