The gametophytic plant body is nonvascular in which of the following?

Gymnosperms resemble Angiosperms in having:

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 the sperms of $Funaria$ and $Pteris$ are put together near the archegonia of $Pteris$,only the sperms of $Pteris$ readily enter the archegonia and reach the egg. The reason being that

Spirogyra differs from Mucor in having

How many categories does the sub-class '$A$-da' (or '$A$-dae') contain?