Question

In dryopteris
A. Sporophyte is parasitic over gametophyte
B. Sporophyte is independent
C. Gametophyte is independent
D. Both b and c

Answer 1

Hint:- The margin of pinnae and leaflets present in the dryopteris sori that is covered with the indusium in the group of sporangia. On the surface of sporophylls that are commonly known as mature fronds present with the 2-8 sori bones and situated between the two rows at the tip of veinlets that are kept between the margins and midrib. Indusium covered the membranous of the thin shaped kidney due to the sori appearance of the reniform inside it.

Complete Answer:- The male ferns and wood ferns commonly known as the name of dryopteris and found in the dryopteridaceae family and dryopteridaceae subfamily of the genus according to the pteridophytes phylogenetic classification given in the year 2016. There are mostly 300-400 species that are distributed in the Pacific island, Europe, Africa, Europe and highest diversity in the eastern Asia. Ring of fronds, crown, slowly creeping rootstock many species found in the sori round with the peltate indusium that have prominent scales of the stripes. Many species that formed from this process are commonly known as polyploidy and hybridization. Dryopteris abbreviate, aemula, daffins, alpestris, amurensis, apicisira, azorica, backer, barbigera borreri and many more species present in the dryopteris species.

Therefore the correct option is (D).

Note:- The temperate zones in the northern hemisphere where the 250 species of the dryopteris genus present with the haploid gametophyte and diploid sporophyte. On the ventral side in which bears the sex organs in the monoecious prothallus found in the haploid spore of the gametophyte Sporophyte obtained after the fertilization that dominated on the asexual members of the part of the plants.