Box and whisker plot of the evolution parameter for various species and organs.

<p>The median, mean and SD values are shown in the figure, the box edges represent the 25th and 75th percentiles, the whiskers extend to the most extreme data points not considered outliers. Outliers (star symbols) are larger than P₇₅+1.5(P₇₅-P₂₅) or smaller than P₂₅−1.5(P₇₅-P₂₅), where P₇₅ and P₂₅ are the 75th and 25th percentiles, respectively.