The megasporangium proper of an angiosperm ovule is represented by:

Which type of ovule is found in Papaver?

Define the following terms:
$1.$ Embryo sac
$2.$ Monosporic development

How many meiotic divisions are required for the formation of $100$ functional megaspores?

What is the correct sequence for the formation of an embryo sac?

Identify the parts of the pistil labeled as $P$,$Q$,and $R$:
Receptive surface for pollen grains $- P$
Elongated slender part of the pistil $- Q$
Basal swollen part of the pistil $- R$
$\quad\quad\quad\quad P \quad\quad\quad Q \quad\quad\quad R$