Final answer:
The reproductive structures of angiosperms include the stamen and pistil, with pollination transferring pollen to the pistil and fertilization involving the union of sperm and egg. Sepals and petals protect the flower and attract pollinators, while the ovary and ovule develop into fruit and seed post-fertilization.
Step-by-step explanation:
Angiosperm Reproductive Structures
The reproductive structures of angiosperms, or flowering plants, include several integral parts that work together to ensure successful reproduction. These include the stamen and pistil, the male and female reproductive organs, respectively; pollination and fertilization processes; the protective sepals and the attractive petals; as well as the ovary and ovule where seeds develop post-fertilization.
Stamen is composed of an anther, which produces pollen, and a filament. The pistil, sometimes consisting of multiple fused carpels, includes the stigma that catches pollen, the style through which the pollen tube grows, and the ovary that contains the ovules. The sepals protect the flower bud, and the petals attract pollinators. Pollination occurs when pollen is transferred to the stigma, and fertilization happens when a pollen grain’s sperm merges with an ovule’s egg to form a zygote. Finally, the ovary matures into a fruit to help seed dispersal, protecting the ovules that develop into seeds upon fertilization.