(a)
(i) Inner and outer integument.
(ii) Egg cell.
(iii) Polar ruclei.
(iv) Micropyle.
(v) Funicle.
(b) (i) Pollen grains are light in weight, non-sticky, dry and winged.
(ii) Well-exposed stamens for easy dispersal of pollen grains in the wind.
(iii) The stigma is sticky, large and feathery to trap pollen grains floating in the air.
(iv) Numerous flowers are packed together to form inflorescence.