In order for a seed to form in a flower, pollen must be transferred from a male flower part (from the same flower or from another flower) to the female flower part.
(a seed; to form; L:in a flower) (pollen; must be transferred; from a male flower part (from the same flower or from another flower; to the female flower part)
a seed pollen
to form must be transferred
L:in a flower
from a male flower part (from the same flower or from another flower to the female flower part