Example of self-pollination or cross-pollination, Biology

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A bee visits several flowers in succession on a single willow herb plant. In doing so, the bee transfers pollen from the younger flowers, near the top of the inflorescence (group of flowers) to the older flowers near the base of the inflorescence. Is this an example of self-pollination or cross-pollination?

Transfer of pollen among flowers on the same plant is self-pollination; so is transmitted of pollen within the similar flower.

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