Fill in the blanks with appropriate words.
(i) Resistance to the most plants is the ability to prevent the pathogen from causing disease and is determined by the `"______"`.
(ii) Smooth leaved and `"______"` cotton vaneties do not attract bollworms.
(iii) It has been possible to develop and iron fortified `"______"` variety containing over five times as much iron as commonly consumed verieties.