SCIENCE
BOTANY
|
Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
|
The correct order of occurrence of stages in life of Polysiphonia
|
|
Tetraspore, Gametophyte, Zygote, Cystocarp, Gonimoblast, Carposporangium, Carpospore, Tetrasporophyte
|
|
|
Gametophyte, Carposporangium, Carpospore, Tetrasporophyte, Tetraspore, zygote, Cystocarp, Gonimoblast
|
|
|
Zygote, Tetrasporophyte, Tetraspore, Gonimoblast, Cystocarp, Carposporangium, Carpospore, Gametophyte
|
|
|
Tetraspore, Gametophyte, Zygote, Carposporangium, Carpospore, Cystocarp, Gonimoblast, Tetrasporophyte
|
Explanation:
Detailed explanation-1: -Life cycle of Polysiphonia consists of three distinct phases: diploid tetrasporophyte, haploid gametophytes and diploid carposporophyte.
Detailed explanation-2: -In life cycle of Polysiphonia two diploid phases carposprophyte and tetra sporophyte alternate with one haploid gametophytic phase. The life cycle of Polysiphonia can be called as triphasic diplobiontic with isomorphic alternation of generation (Figs.
Detailed explanation-3: -Polysiphonia is a member of the order Ceramiales.
Detailed explanation-4: -Carposporophyte – formed by the union of haploid gametes in red algae; diploid (2n) stage of the life cycle that is carried by the haploid female gametophyte in the cystocarp; produces carpospores.
There is 1 question to complete.