1. The part of the Brassica oleracea that has exhibited the most variation is it's height and mass. That is the area where it has showed the most growth, because of the natural resources they get each day like; sunlight, water, and fertile soil from the ground. After all, the part(s) that made the biggest difference between one extreme and its opposite is the color of their leaves, petals, and stems. Compared to others, all the plants have different colors, and sizes because they have different phenotypes.
2. I think that there is many variability in the domestic forms of Brassica oleracea because of the descent of modification from their ancestors and the genes that have been passed down to them. Like some mutations are harmful, not all of the many mutations are harmful.
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