Pollination: Pollen grains are transferred from the anther to the stigma of a flower.

Here are the stages of fertilization in flowering plants:

1. Pollination: Pollen grains are transferred from the anther to the stigma of a flower.
2. Pollen Germination: Upon landing on a compatible stigma, the pollen grain absorbs moisture and nutrients, then germinates to form a pollen tube.
3. Pollen Tube Growth: The pollen tube grows through the style, carrying two male gametes (sperm cells) towards the ovule within the ovary.
4. Entry into Ovule: The pollen tube penetrates the ovule, typically through an opening called the micropyle.
5. Double Fertilization: Inside the ovule, one male gamete fuses with the egg cell to form a zygote, which develops into the embryo. The other male gamete fuses with the central cell (containing two polar nuclei) to form the primary endosperm nucleus, which develops into the endosperm, providing nourishment for the embryo.