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

What is the arrangement of nuclei in a typical mature embryo sac of an angiosperm?

Which of the following parts belong to the gynoecium? $P$ - Stigma,$Q$ - Anther,$R$ - Style,$S$ - Ovary,$T$ - Connective,$U$ - Filament

Choose the correct sentence$(s)$.
$(I)$ Nucleus of the functional megaspore divides meiotically to form two nuclei.
$(II)$ After the $8$-nucleate stage,cell walls are laid down leading to the organization of a typical female gametophyte.
$(III)$ The egg apparatus consists of two synergids and one egg cell.
$(IV)$ Three cells at the chalaza end are called antipodal cells.

The embryo sac is:

In flowering plants,the megaspore develops into the embryo sac,which contains .....