Which plant life cycle generation is haploid and gives rise to a new plant after mitosis?

• A. Sporophyte generation
• B. Gametophyte generation
• C. Diploid generation
• D. Zygote generation

Answer: (B)

In plant life cycles, generations alternate between haploid and diploid forms. The haploid generation is the gametophyte. It comes from spores that were produced by meiosis in the diploid sporophyte, and those spores germinate and divide by mitosis to form a multicellular haploid plant—the gametophyte. This haploid plant then produces the sex cells by mitosis, and when those gametes fuse, they form a diploid zygote that grows into the sporophyte. So the haploid generation is the one that can establish a new plant through mitotic growth, which is why the gametophyte is the correct answer.