Through studies on plankton, Allen et al. showed that manipulating this variable can cause exponentially higher rates of evolutionary change. A factor that corrects for this variable is added to the West–Brown–Enquist model in the metabolic theory of ecology. This variable affects aromatase accumulation to impact the outcome of a “sensitive” period in one class’s (15[1])development. David (15[1]-5[1])Atkinson (15[1])built on Bergmann’s rule (-5[1])to describe (15[1])how organisms’ (*) size relates to this (10[1])variable. (10[5]-5[4])This variable increases the number of niches (-5[1])in an ecosystem (-5[1])by (-5[1])increasing (-5[1])primary (-5[1])productivity. (10[2])Sex determination (-5[1])in most (10[1])reptiles is driven (10[2])by (10[3])this (10[2])variable, (10[11])which decreases (10[2])along (10[1])with metabolic rate and activity during hibernation. For 10 points, name this variable, which organisms can regulate by sunning (10[2])or resting in shade. (10[3])■END■ (10[8])