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

$A$ typical angiosperm embryo sac at maturity has

The egg apparatus of angiosperms consists of

The three cells present at the chalazal end form $.....P......$,and the three cells present at the micropylar end form $.....Q.....$.
$\quad\quad\quad \quad \text { P } \quad\quad\quad \text { Q }$

Which stage does the egg cell represent?

Synergids are