Bees need nectar and pollen, and the flowers need a mechanism by which pollen can be transported from blossom to blossom.
(Bees; need; nectar and pollen) (the flowers; need; a mechanism by which pollen can be transported from blossom to blossom) (pollen; can be transported; from blossom to blossom)
Bees the flowers pollen
need need can be transported
nectar and pollen
a mechanism by which pollen can be transported from blossom to blossom
from blossom to blossom