Fig. 7
From: Artificial Selection and Domestication: Modern Lessons from Darwin’s Enduring Analogy
An example of the modification of existing structures through artificial selection. (a) Wild Brassica oleracea, from which various domesticated cultivars have been produced based on changes to specific plant parts: (b) broccoli (and cauliflower; flower clusters), (c) cabbage (leaves), (d) kale (leaves), (e) Brussels sprouts (leaf buds), and (f) kohlrabi (stems). All images from Wikipedia