Final answer:
Option (b), Rhizoids are produced on the underside of fern gametophytes. Ferns have a dominant sporophyte generation with sporangia that produce haploid spores, forming gametophytes with rhizoids for attachment.
Step-by-step explanation:
False. Rhizoids are produced on the underside of fern gametophytes, not on the upper surface. In the life cycle of a fern, a mature sporophyte fern has leafy fronds whose undersides are dotted with clusters of sporangia. The sporangia produce haploid spores that develop into tiny, heart-shaped gametophytes.
These gametophytes are attached to a substrate via rhizoids, which are filaments of non-photosynthetic cells. Additionally, it’s important to note that the mature gametophyte is haploid and the diploid sporophyte grows from the gametophyte, but the sporangia form on the underside of the sporophyte, not the gametophyte.