In plant $A$,$2n = 12$ and in plant $B$,$2n = 16$. Then the ploidy number (total chromosome number) of the hybrid plant resulting from cross-breeding is:

Statement $X$: In gymnosperms,the endosperm is formed before fertilization.
Statement $Y$: In angiosperms,double fertilization is observed.

Identify the type of flower $A$ and $B$ in the given diagram.

Match the following by using the codes provided:

$A$. Vernalization	$1$. Camerarius
$B$. Double fertilization	$2$. Hofmeister
$C$. Pollination	$3$. Lysenko
$D$. Alternation of Generations	$4$. Nawaschin

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

Banana is a parthenocarpic fruit because