How phytohormones help the development of parthenocarpic fruits?
The Parthenocarpic fruits are those produced with no fecundation. Several plants naturally make parthenocarpic fruits, like the banana tree, stimulated by their own hormones.
The Angiosperms that don't naturally produce parthenocarpic fruits may do it if auxins are applied to flowers before fecundation. Consequently even without fecundation the ovaries grow and fruits are formed although seedless.