In a diplontic life cycle,the zygote:

Statement $X$: $Allium$ $cepa$ shows a diplontic life cycle.
Statement $Y$: The diploid sporophytic phase is the main,long-lived,dominant,photosynthetic,and independent phase.

The life cycles of $Ectocarpus$ and $Fucus$ are respectively ....... .

Which of the following exhibits a haplontic life cycle?

Which of the following statements is correct about the gametophytic stage in the alternation of generations within the life cycle?

Which dominant phase is observed in the given figure?