Angiosperms are the most diverse group of land plants but they all have similar structures to help with reproduction.
For example, all angiosperms have petals which act as eye candy for organisms. The petals would be the first thing that other organisms see and the vibrant colors would cause organism to approach the flower. Then the angiosperms would use the pollen that is generated by the anther to stick pollen to the organism, allowing pollen to be spread to other plants. Pollen can also be transferred by means of forces of nature, for example, wind or rain. The carpel of the angiosperm contains the ovaries, so the stigma would receive pollen from other organisms or the wind and begin reproduction.
https://sixlegsonecorolla.files.wordpress.com/2012/07/generalised_flower_diagram.jpg
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