They have no petals, which make up the showy part of the flower in most plants.
(They; have; no petals, which make up the showy part of the flower in most plants) (no petals; make up; the showy part of the flower in most plants)
They no petals
have make up
no petals, which make up the showy part of the flower in most plants
the showy part of the flower in most plants