Just like the California coast, the coastal region of Alaska’s Aleutian Islands are home to sea urchins and kelp forests. Predict the changes in these populations that marine scientists have documented since the 1990s. What has been causing these changes, and how have they affected the food chains found in this region?

1. variations in a population of moths allow for some of its members to be able to adapt to environmental changes. the better adapted of the moths will be able to survive the change and thus prevail as the “fittest” of the species. (a) describe three mechanisms in which variation can occur within a species population. (b) explain which mechanism or mechanisms would be responsible for the survival of a population of peppered moths better than white moths in an environment affected by industrial soot. justify your answer.