Which of the following has Sporic meiosis?
Pteridophytes show sporic meiosis, i.e. formation of spores by meiosis, which germinates to give rise to gametophytes. Spores are formed in the sporangia by meiosis in spore mother cells.
What is Sporic meiosis?
In sporic meiosis (also commonly known as intermediary meiosis), the zygote divides mitotically to produce a multicellular diploid sporophyte. The sporophyte creates spores via meiosis which also then divide mitotically producing haploid individuals called gametophytes.
Do plants go through Sporic meiosis?
Sporic meiosis occurs in plants with two phases in their life cycle. It is termed intermediary meiosis because of the haploid and diploid phases in their life. Two types of cells produced are spores and gametes. Sporic meiosis cycles between the diplontic and haplontic life of a plant.
What is Diplontic life cycle give an example?
Difference Between Diplontic and Haplontic Life Cycle
|Diplontic Life Cycle||Haplontic Life Cycle|
|Angiosperms, Gymnosperms, some algae such as Fucus, Cladophora, etc.||Most of the algae such as Volvox, Spirogyra, etc.|
Do gymnosperms show Sporic meiosis?
All plants except Thallophyta. … Other members of the plant kingdom like bryophytes, pteridophytes, gymnosperms, and angiosperms, when form diploid zygote, undergo sporic meiosis to form a multicellular sporophyte and then give rise to haploid spores which make new plants.
Do gymnosperms have zygotic meiosis?
The zygote undergoes meiotic division to form haploid spores and thus zygotic meiosis occurs in most algae. The haploid spores undergo mitosis to form haploid gametophytes. … The female and male gametophytes do not have an independent free-living existence in gymnosperms.
What does Sporic mean?
The term sporic refers to the fact that spores are the result of meiosis. The sporic life cycle results from an alternation between a haploid and a diploid organism. Because of this, sometimes this cycle is referred to as the “alternation of generations”.
What is the difference between zygotic and Sporic life cycles?
In the gametic life cycle, the gamete (egg or sperm) is the only haploid cell produced. In the zygotic life cycle, the zygote is the only diploid cell produced. In the sporic life cycle, you see alternating multicelled 2n and 1n generations.
Which of the following structures in an angiosperm is triploid?
Endosperm is a nutritive tissue and it is triploid.
Do ferns produce Microgametophytes?
In heterosporous plants (water ferns, some lycophytes, as well as all gymnosperms and angiosperms), there are two distinct sporangia, each of which produces a single kind of spore and single kind of gametophyte. … In seed plants, the microgametophyte is called pollen.
Which type of meiosis occurs in Pteridophytes?
In pteridophyte or ferns or Dryopteris meiosis occurs in spore mother cell during spore formation.
What is a moss gametophyte?
Grimmia pulvinata. THE GAMETOPHYTE. The gametophyte refers to all organs and tissues that are a part of the haploid generation. 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.
Which of the following has Haplontic life cycle?
Explanation: Ustilago has a haplontic life cycle. This is a simplest and most primitive type of life cycle.
How many of the following organisms show Diplontic life cycle?
Angiosperms and gymnosperms shows diplontic life cycle but there is an exception of a brown alga fucus which comes under phaeophyceae also shows diplontic. so the ans is 7 of them -pea,fucus,cedrus,mustard,mango,pinus and agave.
Which algae has haplo Diplontic life cycle?
While most algal genera are haplontic, some of them such as Ectocarpus, Polysiphonia, and Kelps are haplo-diplontic.