The function of the embryonal suspensor in angiosperms is to

Identify the $A$ to $E$ in the following diagram.

Who first studied embryogeny in $Capsella$?

The root cap is covered by an undifferentiated sheath called $P$,and the shoot apex is enclosed in a hollow foliar structure called $Q$.
$\quad\quad\quad P \quad \quad Q$

The diagram below shows a fertilised ovule and carpel. Which numbers represent the structures which will become:
$(i)$ The future embryo
$(ii)$ The future testa
$(iii)$ The future micropyle of the seeds
$(i), (ii), (iii)$ respectively?

The scutellum observed in a grain of wheat or maize is comparable to which part of the seed in other monocotyledons?