Question
Biology Question on Fertilisation And Implantation
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
through one of the synergids
Explanation
Solution
Entry of pollen tube into the ovule may be possible through micropyle (porogamy), through chalaza (chalazogamy) and through integuments (mesogamy). But in most cases pollen tube enters through micropyle. Irrespective of the place of entry of pollen tube into the ovule, the tube invariably enters the embryo sac at micropylar end in between the egg cell and synergid.