Dr. Shields is a scientist at the local botanical gardens. Recently, she completed an investigation involving a specific type of flowering plant. Part of her investigation involved measuring features of the plants over 100 successive generations. The table below summarizes Dr. Shields' measurements. Examine the measurements, and be sure to note that the table shows data only for the first and every tenth generation. Generation Average Stem Length (cm) Average Leaf Width (cm) Average Flower Diameter (cm) 1 14.2 4.1 5.6 10 14.4 4.1 5.6 20 15.8 4.1 5.6 30 17.1 3.7 5.5 40 18.9 3.1 5.6 50 20.3 2.7 5.6 60 20.3 2.3 6.1 70 20.3 2.2 6.8 80 20.2 2.3 7.6 90 20.3 2.3 7.9 100 20.3 2.3 8.2 Based on the table above, Generation 100 is very different from Generation 1. The difference in leaf width can best be explained by