Consumersub-groups of differentlevels, different tastes, thenacorrespondingnumberof commercial housingis grades, and some of the so-calledturnipcabbage love.
From a primitive plant called brassica, laborious trial-and-error genetic modification over centuries created canola, cabbage, bok choi, cauliflower, Brussels sprouts, broccoli, kale, rutabaga, mustard and turnip, among others.