What is the process called where the pollen tube carries the male gametes to achieve fertilization?

Which of the following statements are true?
$P = \text{Papaver}$ has a multicarpellary syncarpous pistil.
$Q = \text{Endothecium}$ provides nourishment to the Microspore Mother Cell.
$R = \text{Commelina}$ has chasmogamous and cleistogamous flowers.

Approximately how tall is the inflorescence of the Century plant (Agave)?

Find the odd one out.

Thymus possesses two types of plants,female flowered and hermaphrodite flowered. The condition is called

Arrange the following terms in the correct developmental sequence: Pollen grain, sporogenous tissue, microspore tetrad, pollen mother cell, male gametes.