What occurs in the life cycle of a moss but not in the life cycle of a gymnosperm?
In moss, sperm and egg cells are produced after haploid spores are separated from the sporophyte plant.
In moss, sperm and egg cells grow in cones that are attached to the sporophyte plant.
In moss, sporophyte and gametophyte generations alternate.
In moss, when two haploid cells fuse, they form a diploid zygote that begins the sporophyte generation.

What occurs in the life cycle of moss that does not occur in the life cycle of gymnosperms is that in moss, sperm and egg cells are produced after haploid spores are separated from the sporophyte plant.

Explanation:

Moss have a type of cyclical reproduction, in which the spores produced by meiosis form the protoneme. From the protoneme, gametophytes develop, whose multiplication, by mitosis, originates the male and female sexual organs, that is, the antheridium and archegonium.

After the fertilization of archaegonium, spores are produced by meiosis, which are released to form new protonemes that will contain more haploid gametophytes.

So, in the moss, sperm and egg cells are produced after haploid spores -presents in the protonema- are separated from the sporophyte plant.

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Moss gametophyte

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Explanation: