Question

The pollen tube usually enters the embryo sac

• A. Through one of the synergids.
• B. By directly penetrating the egg.
• C. Between one synergid and central cell.
• D. By knocking off the antipodal cells.
  

Answer 1

The correct option is A

Through one of the synergids.

Pollen tube grows through the style and reaches the micropylar end. At the micropylar end, there are two synergids around the egg. The synergids have filiform apparatus that guides the pollen tube towards the egg. Thus the pollen tube enters embryo sac through one of the synergids.