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Earlier discussion
4 older comments kept for context.
Abubakar Abdulrahman
go and check chat-gpt or any Ai or the latest update of the question in jamb 2018, the answer is gametophyte
Favour Onwuchekwa
[D]- Pollen grains is absolutely correct.
Abubakar Abdulrahman
go and confirnyour answers
Oluwaseun Adeyemi
Pollen grains form in the two pollen sacs located in the anther. Each pollen sac contains specialized chambers in which the microspore mother cells are enclosed and protected. The microspore mother cells undergo meiosis to form four haploid microspores. Subsequently, mitotic divisions form four pollen grains. Inside each pollen grain is a generative cell; this cell will later divide to produce two sperm cells. Pollen grain shapes are specialized for specific flower species.