Analysis of the Rate of Change of the Microcosms over 1000 Generations.

aValues are means and 95% confidence intervals based upon t-distribution with df = 11.bRate of change during the last 500 generations was calculated as twice the rate of change during 1000 generations minus the rate of change during the first 500 generations.cDifference calculated as rate of change during the first 500 generations minus the rate of change during the last 500 generations.dNull hypothesis is that the difference in slopes is equal to zero.eTwo-tailed probability computed from the t-distribution with df = 11.fIn pixels.