After penetrating stigmtic and stylar tissue, the pollen tube usually grows downwards towards egg because

After penetrating stigmatic and stylar tissue, the pollen tube usually grows downwards towards egg because

The pollen tube usually enters the embryo sac:

A pollen tube grows down the style because

Pollen tube usually enters the embryo sac :

How does pollen tube grow towards the ovary of the flower?

The growth of pollen tubes towards ovules is due to

The growth of pollen tubes towards ovules is due to

The growth of pollen tubes towards ovules is the example of :