Final answer:
The statement 'Sporangia are on the underside of the leaf and might or might not be covered with indusium' is true. Sporangia are found in clusters on the undersides of fern leaves, sometimes protected by an indusium.
Step-by-step explanation:
The statement that sporangia are on the underside of the leaf and might or might not be covered with an indusium is True. Sporangia, which are structures that produce and disperse spores, are typically found in clusters called 'fruit dots' on the undersides of fern leaves. These clusters may be covered by a protective flap of tissue known as the indusium. The presence of an indusium can vary between different fern species.
In the fern life cycle, the sporophyte is the diploid generation which bears the sporangia; it arises from the haploid gametophyte. The fern's life cycle includes the sporophyte growing from a gametophyte, with the sporophyte being diploid and the gametophyte being haploid. Sporangia indeed produce haploid spores. However, the false statement among the given options is that sporangia form on the underside of the gametophyte; in fact, they form on the underside of the sporophyte. The gametophyte is a different stage in the life cycle where gametes are produced, not spores.