$A$ : Initial growth of pollen tube takes place on expenditure of food present in the stigma and style.
$R$ : Pollen tube travels intracellularly and chemotactically.
Assertion and Reason both are correct and also correct explanation.
Assertion and Reason both are correct but not explanation of assertion.
Assertion is correct, but Reason is incorrect.
Both Assertion and Reason are incorrect.
Pollen-Pistill Interaction is mediated by
Growth of pollen tube towards embryo sac is
The generative cell of a two-celled pollen divides in the pollen tube but not in a three-celled pollen. Give reasons.
Identify $X$ and $Y$ from figure.
Give information about compatible and incompatible pollen.