Which of the following stimulates pollen germination and pollen tube growth?

By which process does the tip of the pollen tube rupture within the embryo sac?

Identify the correct order of events in pollen-pistil interaction from the options given below.
$I.$ Release of male gametes into the embryo sac
$II.$ Deposition of pollen grains on stigma
$III.$ Entry of pollen tube into embryo sac
$IV.$ Development of pollen tube
$V.$ Entry of pollen tube into the ovule

What is the function and location of the filiform apparatus in synergids?

Name the part of the gynoecium that determines the compatible nature of the pollen grain.

What does the pollen tube transport?