Question

Both alternations of generations and alternation of hosts are present in
A) Wuchereria
B) Fasciola
C) Taenia
D) Ascaris

Answer 1

All plants go through a day to day existence cycle that takes them through both haploid and diploid ages. The multicellular diploid plant structure is known as the sporophyte, which produces spores through meiotic (agamic) division. The shift of multicellular diploid and haploid structures in the existing pattern of the creature is known as the shift of qualities. In 1851, Hofmeister first gave this cycle.

Complete answer: In bryophytes, when the two ages are morphologically unique, at that point the sort of rotation of ages is known as heteromorphic. The haploid stage (n) is known as the gametophyte or sexual age. It has the sexual conceptive organs which produce gametes, i.e., antherozoids and eggs. With the consequence of gametic combination, a zygote is shaped, which is the sporophyte. This is the diploid stage (2n). This sporophyte produces spores That consistently develop and structure gametophytes.
During the arrangement of spores, the spore Mother cells(SMCs) partition meiotically, and Haploid spores are delivered. The start of The haploid stage is set apart by the creation of spores. The spores at that point sprout and produce the gametophyte or haploid stage. The spores develop and produce gametophytes that bear sex organs.
Eventually, the gametic combination happens, Zygote is shaped. It is diploid (2n). This is the start of the sporophytic or diploid stage. Along these lines, the sporophyte age mediates between treatment (syngamy) and meiosis (reduction division); and gametophyte age intercedes among meiosis and treatment. The gametophytic stage is a prominent and Longer-lived period of the existence cycle. The gametophyte age of the bryophyte is Generally lasting and photosynthetically Autonomous of the sporophyte, which shapes a personal interconnection with the gametophytic tissue, particularly at the base, or foot, of the sporophyte. Normally lasting and photosynthetically free of the sporophyte, which shapes a private interconnection with the gametophytic Tissue, particularly at the base, or foot, of the sporophyte.
In Fasciola abiogenetic happens by germ cells of sporocyst and redia followed by sexual multiplication in the grown-up stage. This is known as the shift of age in the existing pattern of Fasciola. Youthful Fasciola eggs are released in the biliary conduits and the stool. Eggs become embryonated in water and eggs discharge miracidia which attacks an appropriate snail, a moderate host. In the snail, the parasites go through a few formative stages. The cercariae are delivered from the snail The number 5 and encyst as metacercariae on amphibian vegetation or different surfaces. Vertebrates gain contamination by eating vegetation containing metacercariae. People can get contaminated by ingesting metacercariae containing freshwater plants, particularly watercress. Along these lines, Fasciola changes the host as indicated by their formative necessities.
Thus, the answer is option B:Fasciola

Note: Bryophyte, a nonvascular seedless plant, which incorporates three divisions, specifically, greeneries (division Bryophyta), hornworts (division Anthocerotophyta), and liverworts (division Marchantiophyta). ‘Metagenesis’ or ‘heterogenesis’, are the kinds of the shift of age. The two stages, or ages, are regularly morphologically and chromosomally unmistakable.