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Plant Kingdom — BIOLOGY STD 11 Science — Question

Rajasthan BoardEnglish MediumSTD 11 ScienceBIOLOGYPlant Kingdom2 Marks
Question
Differentiate between haplontic and diplontic life cycles.
✓

Answer

S.No.
Haplontic Life cycle
Diplontic Life cycle
(a)
The haploid phase is dominant and the diploid phase is represented only by the zygote.
The diploid phase is dominant and single-celled or few celled gametophytes are the only haploid phase in the life cycle.
(b)
Zygote undergoes meiosis; embryo and sporophyte are absent, e.g. Algae such as Spirogyra.
Zygote develops into an embryo and then into a sporophytic plant, e.g. Gymnosperms and angiosperms.

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