In bryophytes and pteridophytes,$.......$ is required for the transport of male gametes.

Which groups depend on an external source of free water for fertilization?

What are seed-bearing plants called?

$A$ - In bryophytes,the gametophyte is dominant and haploid.
$B$ - In pteridophytes,the gametophyte is multicellular,short-lived,and haploid.

Consider the following four statements. Which of them are wrong?
$(a)$ The sporophyte in liverworts is more elaborate than that in mosses.
$(b)$ $Salvinia$ is heterosporous.
$(c)$ The life cycle in all seed-bearing plants is diplontic.
$(d)$ In $Pinus$,male and female cones are borne on different trees.

When and where does reduction division (meiosis) take place in the life cycle of a liverwort,a moss,a fern,a gymnosperm,and an angiosperm?