3911
Question
Which of the following sequences is correct with regard to the life cycle of pteridophytes?
Which of the following sequences is correct with regard to the life cycle of pteridophytes?
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Solution
The correct option is B Sporophyte, meiosis, spores, gametophyte
Life cycle of pteridophytes (haplo-diplontic life cycle):
Sporophyte (2n)
↓
Spore mother cells (2n)
↓ Meiosis
Spores (n)
↓
Gametophyte (n)
↓ Mitosis
Gametes (n)
↓ Fertilisation
Zygote (2n)
↓ Mitosis
Embryo (2n)
↓
Sporophyte (2n)
Life cycle of pteridophytes (haplo-diplontic life cycle):
Sporophyte (2n)
↓
Spore mother cells (2n)
↓ Meiosis
Spores (n)
↓
Gametophyte (n)
↓ Mitosis
Gametes (n)
↓ Fertilisation
Zygote (2n)
↓ Mitosis
Embryo (2n)
↓
Sporophyte (2n)
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