science
Grade-10
Easy
Question
Which of the following is INCORRECT about the diplontic life cycle?
- Sporophyte is dominant.
- Gametophyte depends on the sporophyte.
- Sporophyte depends on the gametophyte.
- All spermatophytes exhibit diplontic life cycle.
Hint:
Life cycle of angiosperms.
The correct answer is: Gametophyte depends on the sporophyte.
Plants like angiosperms, gymnosperms, algae like Fucus, all exhibit diplontic life cycle.
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 these plants and algae.
- Sporophyte is dominant in angiosperms and is independent plant
- Gametophyte is reduced form
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