Syngamy means
Fusion of similar spores
Fusion of dissimilar spores
Fusion of cytoplasm
Fusion of gametes
Filiform apparatus are
The cells in embryo sac which act as haustoria are
Describe the structure of Megasporangium with a diagram.
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