Which plant flowers once every $12$ years?

Rearrange the following events of sexual reproduction in the sequence in which they occur in a flowering plant: embryogenesis, fertilisation, gametogenesis, pollination.

Chalazogamy is found in

Which of the following processes occur simultaneously?
$(i)$ Ovule $\rightarrow$ Seed
$(ii)$ Ovary $\rightarrow$ Fruit
$(iii)$ $MMC$ $\rightarrow$ Megaspore
$(iv)$ $PMC$ $\rightarrow$ Pollen grain

How many meiotic divisions are required to produce the pollen grains necessary for the formation of $800$ wheat seeds?

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.