The arrangement of megaspores in a tetrad in a gymnosperm is:

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

In the given figure,the labeled part $X$ is formed by:

Choose the correct sentences:
$(i)$ The gynoecium represents the female reproductive part of the flower.
$(ii)$ Ovule is located in the anther.
$(iii)$ Each pistil has three parts: the stigma,style,and ovary.
$(iv)$ The uppermost part of the gynoecium is the anther.

When the chalaza,funicle,and micropyle lie in a single straight line,the ovule is called......

The ovule of angiosperms might be evolved from: