Botany and Plant Science

Gymnosperm endosperm is haploid because it is formed from the female gametophyte tissue before fertilization. In contrast, angiosperm endosperm is triploid and forms after fertilization via double fertilization.

Gymnosperms are vascular plants that lack true vessels in their xylem and companion cells in their phloem, which are characteristic features of angiosperms.

Gymnosperms like Cycas and Ginkgo retain ciliated, motile male gametes. While most advanced spermatophytes have lost this trait, it persists in these primitive gymnosperm groups.

Both pteridophytes and gymnosperms produce archegonia as the female sex organ. They differ in that gymnosperms produce seeds and have ovules, while pteridophytes generally do not.

Cedrus is a gymnosperm. In gymnosperms, male and female gametophytes do not have free independent existence. They remain within the sporangia retained on the sporophytes. 

Gymnosperm generally lacks xylem vessels and companion cells in phloem as it grows in a cold and dry climate and they didn't evolve to have vessels and vessels are considered as advanced elements of xylem. And companion cells in phloem assist active transport of minerals which is absent in Gymnosperm.

Zygotes do not undergo reduction division immediately. They produce a multicellular body called a sporophyte. The sporophyte is not free-living but attached to the photosynthetic gametophyte and derives nourishment from it. Some cells of the sporophyte undergo reduction division (meiosis) to produce haploid spores. So, the correct option is "A" (Funaria).

The main plant body of a bryophyte like Funaria is the gametophyte, which is haploid (n).

In Funaria, the rhizoids are multicellular, branched, and possess oblique septa.

There are two different developmental stages of the gametophyte: the Protonema, and the gametophore. The Protonema is the first part of the moss that develops from the germinating spore.

The sporogonium in Funaria develops at the apex of the female shoot (gametophore) after fertilization.

The moss sporophyte is completely dependent upon the gametophyte for its nutrition. The sporophyte is responsible for producing spores.

The Funaria plants are monoecious and autoecious, i.e., male (antheridia, club shaped) and female (archegonia, flask shaped) reproductive organs are produced on, the same plant but on different branches.