The pollen tube usually enters the embryo sac:

During the process of fertilisation the pollen tube of the pollen grain usually enters the embryo sac through

During the process of fertilisation the pollen tube of the pollen grain usually enters the embryo sac through

During the process of fertilization the pollen tube of the pollen grain usually enters the embryo sac through

During the process of fertilisation the pollen tube of the pollen grain usually enters the embryo sac through

During the process of fertilisation the pollen tube of the pollen grain usuallt enters the embryo sac through

Pollen tube enters the embryo sac usually

Pollen tube enters the embryo sac usually

Pollen tube enters the embryo sac usually