A flower has the following: Petals - segments of the flower Sepal - outer parts of the flower at the bottom covered in bud Stamen - produces pollen in the flower Anther - where pollen is produced Pistil - produces ovary of the flower Stigma - where pollen germinates
Pollination occurs when insects like bees and butterflies transfers the pollen from one flower to another. Once transferred, fertilization begins.