In the life cycle of mosses, which structure is responsible for producing haploid spores?

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Question: In the life cycle of mosses, which structure is responsible for producing haploid spores?

Option A: Antheridia. Antheridia are the male sex organs in mosses that produce sperm, not spores. They contribute to fertilization but do not generate haploid spores themselves.

Option B: Sporophyte. The sporophyte is the diploid phase that arises from fertilization and grows a sporangium (capsule) on its stalk. Within the sporangium, meiosis occurs to produce haploid spores, which are then released to begin a new gametophyte generation. This aligns with the standard moss life cycle where the sporophyte houses the sporangium responsible for haploid spore production.

Option C: Rhizoids. Rhizoids are root-like structures that help anchor the moss and absorb water; they do not produce spores.

Option D: Gametophyte. The gametophyte is the haploid phase that produces gametes (sperm and egg) via mitosis in mosses, not spores. Spores are produced by the sporophyte.

Option E: Archegonia. Archegonia are the female sex organs that produce egg cells, not spores. They are involved in fertilization but not spore production.

Summary: Among the options, the structure that generates haploid spores through meiosis within its sporangium is the sporophyte, which houses the sporangial capsule where spore formation occurs.

Module FYM003: ONLINE PRACTICAL QUIZ

In the life cycle of mosses, which structure is responsible for producing haploid spores?

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