The number of nuclei migrating from each of the micropylar quartet and chalazal quartet to the centre of the normal embryo sac is

Which of the following ovules has a horseshoe-shaped embryo sac,and the funicle and micropyle are close to each other?

The ovule of an angiosperm is technically equivalent to

In angiosperms,the following events occur during megasporogenesis and megagametogenesis:
$(i)$ Differentiation of megaspore mother cells
$(ii)$ Meiosis of the megaspore mother cell
$(iii)$ Formation of a linear tetrad
$(iv)$ Mitotic division of the functional megaspore
$(v)$ Degeneration of $3$ megaspores
$(vi)$ Formation of embryo sac
$(vii)$ Fusion of polar nuclei
The correct sequence is:

If the endosperm mother cell of an angiosperm plant has $24$ chromosomes,the number of chromosomes in the $MMC$ will be:

The megasporophyll of $Cycas$ is homologous to which of the following?