Which of the following terms describes a flower with free petals and three series?

Which of these is an example of a zygomorphic flower with imbricate aestivation?

Define the following term: Actinomorphic.

Match the following columns:

Column-$I$	Column-$II$
$P$. Hypogynous flower	$I$. Guava,Cucumber,Ray florets of Sunflower
$Q$. Perigynous flower	$II$. Peach,Rose,Plum
$R$. Epigynous flower	$III$. Mustard,China rose,Brinjal

Suggest a possible explanation why the seeds in a pea pod are arranged in a row,whereas those in tomato are scattered in the juicy pulp.

Among Indigofera,Sesbania,Salvia,Allium,Aloe,mustard,groundnut,radish,gram,and turnip,how many plants have stamens of different lengths in their flowers?