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In gathering the nectar, the honeybees also supply pollination to the flowers by transferring sticky pollen from the stamens of one flower to the pistil of another, thus completing the symbiotic relationship between bees and flowers. The bees supply pollination service in return for the nectar since the flowers cannot achieve pollination by wind due to other characteristics of the plant. In other cases, the flower does not supply nectar but has abundant pollen and the bees actually gather pollen as a protein source while simultaneously supplying pollination. Over ninety agricultural crops in the United States benefit from pollination by honeybees with a total value of over 20 billion dollars per year. |