How many megaspores are produced by the megasporangium of a gymnosperm?

The part of the pistil which acts as a landing platform for pollen grains is called .....

How many pistils are present in a monocarpellary gynoecium?

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

The stalk with which ovules are attached to the placenta is called:

Filiform apparatus is a feature of