Molecular Basis of Inheritance — BIOLOGY STD 12 Science — Question

$I.$ Baculoviruses are pathogens that attack insects and other arthropods

$II.$ Most of these biocontrol agents belong to the genus Nucleopolyhedro virus

$III.$ They do not harm plants mammals, birds, fish and other non-target insects

$IV.$ Baculoviruses are helpful in Integrated Pest Management $(IPM)$ programme, in which beneficial insects are conserved

Choose the correct 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