What is the part located at the pole opposite to the micropyle called?

The ovule is attached to which of the following?

$A$ typical angiosperm embryo sac,at maturity,though $8$-nucleate is . . . . . . .

Which of the following is a diploid structure present in the ovule of Capsella before fertilization?

An orthotropous ovule is one in which the micropyle and chalaza are:

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 $- R$
$\quad\quad\quad\quad P \quad\quad\quad Q \quad\quad\quad R$