$A$ long pollen tube is found in $.......$.

The entry of the pollen tube into the ovule through the micropyle is called .....

$A$: Initial growth of the pollen tube takes place at the expense of food present in the stigma and style.
$R$: The pollen tube travels intracellularly and chemotactically.

In which cell's cytoplasm are both male gametes first released?

Which of the following stimulates pollen germination and pollen tube growth?

The micropyle is helpful in $......$.