When the pollen grains are not transferred from anthers to the stigma in flower due to the barrier or fence, it is referred as or when some natural barrier exists between androecium and gynoecium to check self pollination, it is known as
Heterostyly
Herkogamy
Dichogamy
Cleistogamy
Nucellar embryo is
Chronic respiratory disorders like....... caused by pollen grain
The megaspore mother cell is differentiated from one of the cells of the
Pollen tube enters through
Which one of the following is surrounded by a callose wall?