science
Grade-10
Easy
Question
Which of the following life cycle is exhibited by Fucus?
Haplontic
Diplontic
Triplontic
Haplo-diplontic
Haplontic
Diplontic
Triplontic
Haplo-diplontic
Hint:
The life cycle followed by angiosperms.
The correct answer is: Diplontic
Fucus is a brown algae, which follows diplontic lifecycle.
In diplontic life cycle:
- Diploid sporophyte is dominant
- Haploid sex cells undergo mitosis and form gametes
- The haploid gametes fuse together to form diploid zygote
- The zygote divides following mitosis and forms an independent plant
The gametophyte phase is observed as reduced stage in Fucus.
- Diplontic life cycle has sporophyte phase as dominant and independent
- Angiosperms, gymnosperms, Fucus all show diplontic lifestyle
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