Generally how many megaspores take part in the development of female gametophyte
One
Two
Three
Four
The ploidy level of nucellus and female gametophyte respectively is
Embryo sac is
The functional megaspore undergoes
The formation of embryo sac is called
Indicate the stages where meiosis and mitosis occur $(1,\, 2$ or $3)$ in the flow chart.Megaspore mother cell $\xrightarrow{1}$ Megaspores $\xrightarrow{2}$ Embryo sac $\xrightarrow{3}$ Egg