Practice question

Embryo sac in Polygonum-type typical of approximately seventy percent angiosperms consists of seven cells organized around eight nuclei arising from three sequential free nuclear mitoses of functional megaspore without initial cytokinesis. Configuration comprises micropylar egg apparatus with two synergids flanking egg cell, large central cell with two polar nuclei occupying huge central vacuole, and chalazal three antipodal cells often ephemeral. This precise seven-celled eight-nucleate organization positions egg for fertilization, synergids for pollen tube attraction, central cell for endosperm initiation, and antipodals for transient support or signaling during early seed development stages.