A multicellular, filamentous alga exhibits a type of sexual life cycle in which meiotic division occurs after the formation of the zygote. The adult filament of this alga has:
A
Diploid vegetative cells and haploid gametangia
B
Haploid vegetative cells and diploid gametangia
C
Diploid vegetative cells and diploid gametangia
D
Haploid vegetative cells and haploid gametangia
Correct option is D. Haploid vegetative cells and haploid gametangia
- Many algae show haplontic life cycle. In this case, the dominant phase is the free-living gametophyte.
- Sporophytic generation is represented by single-celled zygote. Meiosis in zygote results in the formation of haploid spores, e.g. Spirogyra and Chlamydomonas.
So, the correct answer is 'Haploid vegetative cells and haploid gametangia'