The zygotic cell settles down and germinates to form a new diploid thallus. Strictly speaking, the so-called gametophyte thallus in Fucus is a sporophyte that undergoes meiosis just before gametes are formed.
What organisms use Sporic meiosis?
The sporic life cycle is common algae and plants. The term sporic refers to the fact that spores are the result of meiosis.
Does zygotic meiosis takes place in Fucus?
Zygotic meiosis is the characteristic of a) Fucus b) Funaria c) Marchantia d) Chlamydomonas. In zygotic meiosis, meiotic division happens in zygote resulting in the development of haploid individuals. Thallophytes have dominant gametophytic generation i.e., the proximity of haploid individuals.
In which algae does zygotic meiosis occur?
Reason: Zygotic meiosis occurs in Spirogyra. Q4. Q5. Assertion :In diplontic life cycle, gametophyte is dominant.
Do gymnosperms show Sporic meiosis?
In bryophytes and pteridophyte- Sporic meiosis takes place. It produces haploid spores. And each spore gives rise to gametophyte body. … So that meiosis in gymnosperms is considered as gametic meiosis.
What respectively are zygotic meiosis gametic meiosis and Sporic meiosis?
Gametes from adult haploid individuals unite forming the diploid zygote. The zygote undergoes meiosis and generates four haploid cells that by mitosis develop into adult individuals. … Sporic meiosis happens in metagenesis (alternation of generations, or diplobiontic life cycle).
Do bryophytes show zygotic meiosis?
Thinking Process All algae except Fucus, Ectocarpus, Dictyota and a few other, show haplontic life cycle or zygotic meiosis, Bryophytes and pteridophytes show haplodiplontic life cycle and undergo sporic meiosis.
Does zygotic meiosis occurs in spirogyra?
So, green algae that is the Spirogyra undergoes zygotic meiosis. Hence, the correct answer is option (B).
Does marchantia show zygotic meiosis?
Note:Zygotic meiosis is a characteristic feature of haploid organisms and cannot take place in diploid or haplodiplontic organisms or organisms with alternate life cycle. Dryopteris and pinus show haplodiplontic life cycle and marchantia show alternate haploid diploid generation.
Does zygotic meiosis occur in gymnosperms?
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.
Does zygotic meiosis occurs in Funaria?
D) Funaria. Hint: In phanerogams, sporadic meiosis is present, in which sporophyte sustains meiosis to form haploid spores. zygotic meiosis is organized in the haplontic life process, in which meiosis arises in the zygote.
How do bryophytes differ from algae?
Bryophytes are considered to be evolved from algae. … The main difference that is found between the algae and bryophytes is the division of the plant body, where no division of labor is observed in the plant body of algae whereas the plant body of bryophytes internally divides into photosynthetic and storage zones.
Does peat moss show Sporic meiosis?
The sporophyte is the diploid generation of peat moss that develops from a zygote as the result of sexual reproduction. Tissue derived from the base of the female organ protects and nourishes the sporophyte during its early stages of development. … Thus, meiosis of one diploid sporocyte yields four haploid spores.
Does Sporic meiosis occur in algae?
All plants except Thallophyta. Hint: Sporic meiosis occurs in those organisms who exhibit both haplontic and diplontic phases in their life cycle that is an alternation of generation. … They are autotrophic, chlorophyll bearing plants commonly called algae.
Do gymnosperms have anthers?
The stamen is the male reproductive structure of a flower; usually consisting of slender, thread-like filaments topped by anthers, which contain the pollen. In gymnosperms the cone is the female reproductive part and the pollen is the male reproductive part. … A single tree usually produces both pollen and seed cones.