In heterosporous members of the pteridophyta
Question and options
In heterosporous members of the pteridophyta
- Development of embryo takes place within the female gametophyte
- Zygote produces a multicellular and undifferentiated sporophyte
- Gametophyte is monoecious
- Spore germination is exosporic
Answer and explanation
Correct answer: A - Development of embryo takes place within the female gametophyte
In heterosporous pteridophytes (e.g., Selaginella) the female gametophyte is retained within the megaspore and the embryo develops within it, a step toward the seed habit. Germination is endosporic and gametophytes are unisexual, so 'gametophyte is monoecious' and 'exosporic germination' are wrong.
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