Which of the following statements is correct for the given figure?

Thick-walled resistant zygote can be produced in the life cycle of:

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.

Which scientists conducted in-depth research in the field of plant classification?

Which of the following is a characteristic of seedless plants?

Plants like mosses and ferns, which reproduce through spores, are placed in which group?