What is the dominant phase of pteridophytes and how is it formed?
GeneralClass 12AllAnswered 27 Mar 2026
Answer
The sporophyte is dominant in pteridophytes:
Formation sequence:
- Spore mother cells in sporangia undergo meiosis → haploid spores
- Spores germinate → prothallus (small gametophyte)
- Prothallus bears antheridia and archegonia
- Flagellated antherozoids swim to archegonia (requires water)
- Fertilization → diploid zygote
- Zygote develops into embryo → mature sporophyte with roots, stem, leaves
Suggested Q&A
General · Class 12- GeneralClass 12Electric Field at Centre of Ring with Non-Uniform Charge Distribution. Four quadrants carry linear charge densities: +2λ, −2λ, +λ, −λ. Find electric field at centre.
- GeneralClass 12P°(hexane) = 408 Torr, P°(heptane) = 141 Torr. x(hexane) = 0.300. Find Y₆ and Y₇.
- GeneralClass 122N₂O₅(g) → 4NO₂(g) + O₂(g). Initial P = 50 mmHg; P at 30 min = 87.5 mmHg. Find P at 60 min.
- GeneralClass 12What is the difference between psychosis and neurosis?
- GeneralClass 12What is the difference between prism and a pyramid?
- GeneralClass 12What is the difference between phrase and clause?