wunder beta📘 Anthers make pollen; stigmas receive it
A flower is a reproductive structure built around a simple meeting: pollen from a male part must reach a female part.
What you’ll learn
- Pollen and flowersIdentify flower structures and how animals brush pollen between blooms.Anthers release pollen; foraging visitors can carry grains toward compatible stigmas.
- How pollen travelsCompare cross-pollination by animals and wind.Cross-pollination mixes genes; wind and animal partners each fit different flower shapes.
- From stigma to seedTrace pollen germination through double fertilization.A compatible stigma lets a pollen tube reach the ovule where sperm fuse with egg and endosperm.
- Seeds and the full pathConnect fertilization, timing, weather, and the full pollination chain.Fertilized ovules become seeds while weather and receptivity decide whether transfer succeeds.
Questions this course answers
Which flower part produces pollen?
Anthers are the pollen-producing parts of stamens.
What is a pollen grain?
Pollen carries the cells that can deliver male gametes.
Why can a bee help pollination?
A bee can carry pollen between compatible flowers while feeding.
What is cross-pollination?
Cross-pollination moves pollen between flowers rather than only within one flower.
What commonly helps wind-pollinated flowers?
Exposed pollen and large catching surfaces improve wind transfer.
How can a hummingbird transfer pollen?
A bird's body can contact pollen while it reaches nectar.
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