Heterospory and seed formation are usually discussed in the context of which structure?

Which of the following forms contain algae?

$A.$ Fucus algae exhibits a diplontic life cycle.
$R.$ In Spirogyra algae,the diploid zygote is the dominant and active stage.

Read the following statements and answer the question based on them:
$(1)$ In liverworts,mosses,and ferns,the gametophyte is free-living.
$(2)$ Gymnosperms and some ferns are heterosporous.
$(3)$ Sexual reproduction in Fucus,Volvox,and Albugo is oogamous.
$(4)$ The sporophyte in liverworts is more elaborate than in mosses.
How many of the above statements are correct?

$A$ fungus contains cells with two nuclei from different genomes. The nuclei do not fuse but divide independently and simultaneously as new cells are formed. It belongs to

Which plant group has limited distribution because they are dispersed by spores?