STD 12 - 6. evolution — BIOLOGY STD 12 Science — Question

$I.$ To minimize their surface volume ratio

$II.$ To minimize heat loss

$III.$ To maximize their surface volume ratio

$IV.$ To maximize heat loss

Choose the correct combination from the given option

$(i)$ 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