Through which cell of the embryo sac, does the pollen tube enter the embryo sac?
Egg cell
Persistent synergid
Degenerated synergid
Central cell
Correct answer: Degenerated synergid
Solution
In angiosperms, the pollen tube is guided by the synergids at the micropylar end of the embryo sac. It typically enters through the degenerated synergid, which has already served its role in attracting the tube.