The haploid structure in seed plants that produces the sperm cells needed for fertilization. In both gymnosperms and flowering plants (angiospermae), it develops inside the pollen grain and is responsible for delivering the sperm cells to the ovule.
The haploid structure in seed plants that produces the sperm cells needed for fertilization. In both gymnosperms and flowering plants (angiospermae), it develops inside the pollen grain and is responsible for delivering the sperm cells to the ovule.