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illustrations 7.1 One gene, different functions 77 7.2 The lancelet (Branchiostoma) 78 10.1 White oak (Quercus alba) 112 11.1 Bipedal and normal goat; leg bones and spine 125 11.2 Variations in the size and shape of the human stomach and liver 126 12.1 The three-toed sloth 135 12.2 The three-toed sloth 141 12.3 Skeleton of a three-toed sloth 144 12.4 Skeleton of a horse 144 12.5 Skulls of a three-toed sloth, new world monkey, and horse 146 14.1 A group of skunk cabbage spathes and leaf buds in March 214 14.2 Skunk cabbage spathes 214 14.3 Skunk cabbage spathe 215 14.4 The development of skunk cabbage 218 ...

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