The megasporangium proper of an angiosperm ovule is represented by:

Which of the following describes a typical mature angiosperm embryo sac?

Given below are two statements: One is labelled as Assertion $(A)$ and the other is labelled as Reason $(R)$.
Assertion $(A):$ $A$ typical unfertilised,angiosperm embryo sac at maturity is $8$-nucleate and $7$-celled.
Reason $(R):$ The egg apparatus has $2$ polar nuclei.
In the light of the above statements,choose the correct answer from the options given below:

Anatropous ovule is found in which of the following?

Identify the given figure.

The tissue that attaches the ovule to the inner side of the ovary is called .......