Answer:
Sporophytic stage
Step-by-step explanation:
The life cycle of plants is in two distinct phases, in which the dominance of either phase is dependent on the phylum of plant involved.
The gametophytic phase involves the production of haploid(n) male and female gametes by the gametophyte (undergoes cell division/meiosis to form gametes). The fusion of these two gametes results in fertilization, which forms a diploid (2n) zygote. The zygote develops into an embryo and ultimately a sporophyte (2n). The dynamics between these two stages in plant is referred to as alternation of generations.