Question

L.s of post pollinated pistil to who entry of pollen tube into mature embryo sac

Answer 1

firstly when any pollen grain laid on stigma it releases some recognition factor after which the stigma provide it's nutrition and food then the pollen tube entry the ovule through synergids. And release two male nuclie.... one fuse with antipodal cell n form zygote and other fuse with polar nuclei and form PEN