The average chihuahua dog weighs 4.4 kilograms with a standa…

The average chihuahua dog weighs 4.4 kilograms with a standard deviation of 1.6 kilos and this variable is normally distributed. Calculate the probability of finding a randomly selected chihuahua that weighs less than 8 kilos. Show your work and your final answer for full credit.

The first image below shows the range of variation that occu…

The first image below shows the range of variation that occurs in the peppered moth.  The second image below shows the change in the population that occurred when the tree bark in their habitat became darker.  Based on the images below, what pattern of natural selection is most likely occurring in this population.