A bee will pollinate a flower if it moves pollen from

the stamen (male part) to the stigma (female part) of the flower.

the anther (male part) of one flower to the stigma (female part) of another flower. This process allows for the transfer of genetic material, which is crucial for the reproduction and survival of many plant species.

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the male part of the flower, called the stamen, to the female part, called the pistil. Here are the steps of how a bee pollinates a flower:

Step 1: Attracted to the flower
Bees are attracted to flowers because of their bright colors, sweet scent, and the nectar they produce. When a bee finds a flower, it lands on it to feed on the nectar.

Step 2: Collecting pollen
While the bee is feeding on the nectar, tiny pollen grains, which are located on the stamen, stick to the bee's body, especially to its hairy legs.

Step 3: Transferring pollen
When the bee is ready to leave the flower, it brushes against the pistil, the female reproductive organ of the flower. During this contact, some of the pollen on the bee's body rubs off onto the sticky surface of the pistil.

Step 4: Pollen germination
Once the pollen grains have landed on the pistil, they may produce a pollen tube, which grows down through the pistil until it reaches the ovary at the base. This process is called pollen germination.

Step 5: Fertilization
The pollen tube delivers the male gametes (sperm cells) to the ovary. These sperm cells fertilize the ovules, which are in the ovary and develop into seeds. Fertilization is the final step in the pollination process and results in the production of seeds.

In summary, a bee pollinates a flower by collecting pollen from the stamen and transferring it to the pistil, where it fertilizes the ovules, leading to the formation of seeds.