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

Question

BlackTom AI · Accepted Answer

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.

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

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