Botany and Plant Science

The peristome is a characteristic structure found around the mouth of the capsule in mosses like Funaria, aiding in spore dispersal.

The protonema is part of the gametophytic generation, which is haploid. The capsule, columella, and seta are parts of the sporophytic generation, which is diploid.

The annulus is a ring of specialized cells located between the operculum (the lid) and the theca (the main body of the capsule), which helps in the dehiscence of the capsule.

In Funaria archegonia, there are multiple neck canal cells, not just two. The other statements correctly describe the sporophyte's semi-parasitic nature, the endothecial origin of spores, and the protonema stage.

The spores of Funaria are generally viable for a longer period than one year. The other statements regarding stomata in the capsule epidermis, the thickness of the spore sac, and the presence of trabeculae are correct.

Funaria is monoecious, meaning both male (antheridia) and female (archegonia) sex organs are produced on the same plant body, though often on different branches.

Gemmae are green multicellular asexual buds, which develop in small receptacles called gemma cups located on the thalli. Gemmae become detached from the parent body and germinate to form new individuals.

Sporophyte of Funaria has embedded foot, an elongated curved seta and a terminal pyriforrn capsule. Sporophyte is nutritionally dependent on gametophyte.

In Marchantia, the plant body consists of a dorsoventrally flattened, prostrate and dichotomously branched thallus. The thalli are conspicuous, the apex of each thallus is notched. Along the mid-rib are present characteristic, prominent goblet or cup-shaped structures, the gemma cups, with smooth, dentate or frilled margins. These cups enclose asexual reproductive bodies called gemma.So the correct option is B.

Funaria exhibits gametophytic (n) as well as sporophytic (2n) generation in its life cycle. The gametophytic (haploid) generation is represented by a short-lived protonema which produces spermatozoids in antheridium of male shoot and egg in archegonium of the female shoot.

The mature sporophyte of Funaria is much more complex than that of the liverworts. It is differentiated into foot, seta and capsule. The foot forms the basal portion of sporophyte. It is a small, dagger-like conical structure embedded in the tissue of the tip of the leafy female branch and functions both as an anchorage and an absorbing organ. The seta is a long cylinder but tough, reddish brown, stalk-like structure. It carries the capsule at its top and raises it more than an inch above the apex of the leafy gametophore. The capsule is a highly organized structure. It is pear-shaped and green at first but later turns yellow, and then orange. Its upper portion is covered by a conical hood or a cap, the calyptra. At maturity, the calyptra falls off laying bare its apex. 

Sphagnum has no seta. In Sphagnum and other basal mosses, the sporophyte is raised by the pseudopodium, a structure produced by the parent gametophyte.  

In Sphagnum, the stems themselves show a greater degree of internal complexity than most other mosses. The stem tissue can be divided into two regions, an inner pith (which may be subdivided into two layers) and an outer cortical layer of larger, usually dead cells. The pith is the site of food production and storage, which the cortical layer functions in water absorption and protection. Located in the cortical layer of many species are retort cells, so named, because they resemble the medieval chemical flasks called retorts. These cells are enlarged more than the surrounding cortical tissue, and have a pore, or opening, at one end. These cells are believed to help the moss retain water under intense sunlight, and they often are home to a wide variety of small invertebrates and other microorganisms.

Capsule wall surrounds a wide air space. It is traversed by multicellular, narrow, uniseriate, green, elongated filamentous strands, known as trabeculae. Trabeculae connect the chlorenchymatous layer of wall with the spore sac.