Spermatophytes produce male microspores and female megaspores. Male pollen must transfer from anther to stigma, by wind {wind-pollinated flower} or by insect, animal, or bird pollinators {pollinator-pollinated flower}. Wind-pollinated flowers do not have fancy flowers or nectar. Spermatophytes transport pollen down pollen tubes to megaspores and unite gametes {pollination}|, to make fertilized embryos. Seeds have one embryo surrounded by endosperm, surrounded by epidermis. Seeds are transportable units.
Biological Sciences>Botany>Plant>Vascular>Angiosperm>Fertilization
4-Botany-Plant-Vascular-Angiosperm-Fertilization
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Date Modified: 2022.0224