What is meant by Haplontic life cycle?
A zygotic meiosis is a meiosis of a zygote immediately after karyogamy, which is the fusion of two cell nuclei. This way, the organism ends its diploid phase and produces several haploid cells. The individuals or cells as a result of mitosis are haplonts, hence this life cycle is also called haplontic life cycle.
What is meant by Diplobiontic life cycle?
This is the life cycle in which the haploid phase is followed by two successive diploid generations. In plants like Polysiphonia the haploid plant (gametophyte) produces diploid zygote after gametic fusion. This is called the diplobiontic life cycle. …
Which of the following algae shows Haplontic life cycle?
Ectocarpus has a haploid-diploid life cycle, like many brown algae, which involves switching between two multicellular generations, the sporophyte and the gametophyte.
Which algae shows diplontic life cycle?
In diplontic life cycle of algae, there is a single somatic phase which is diploid. Haploid condition occurs in gametes (formed through meiosis) which fuse to restore diploid state, e.g., Cladophora glomerata, Bryopsis, Fucus, Sargassum.
What is haplo-Diplontic life cycle Class 11?
Haplo-diplontic life cycle involves the alternation of generations between a haploid gametophyte and a diploid sporophyte. Bryophytes and pteridophytes exhibit this life cycle.
What is haplontic life cycle Brainly?
What is Heteromorphic alternation of generation?
Heteromorphic alternation of generation occurs in organisms in which the haploid gametophyte phase and diploid sporophyte phase are different in form.
What is a Gametic life cycle?
The gametic life cycle is the reproductive cycle found in animals and some protistans. The term gametic refers to the fact that gametes are the result of meiosis. During the gametic life cycle a reproductive cell produces haploid gametes (sex cells such as egg and sperm) that combine to produce a zygote.
Which is haplo Diplontic algae?
Answer: Haplo diplontic type of life cycle is exhibited by Ectocarpus, Polysiphonia and Kelps. Here, diploid saprophytic phase alternate with haploid gametophytic phase. In Fucus, the main plant body is saprophytic and it shows diplontic type of life cycle.
Do algae show Haplontic life cycle?
Most algal genera show a haplontic lifestyle.
Which is are Diplontic algae?
In this type the real plant is diploid and it produces gametes by meiosis. This kind of life cycle is called diplontic type which is exhibited by plants like Fucus, Sargassum, diatoms and certain members of siphonales.
What is haplo Diplontic life cycle with example?
The Haplo-Diplontic life cycle is observed in 8 following plants. This life cycle is present only in Bryophytes and pteridophytes. So, sphagnum, Polytrichum, Marchantia and Riccia are in direct relation with Bryophyta and Selaginella, Pteris, Dryopteris, and Polysiphonia belong to Pteridophyta.