Why does this recent discovery about the Galapagos finches prove that it's often challenging for scientists to determine when two groups of individuals are separate species? What factors do scientists need to consider when determining
whether a species is a new species or part of an existing species?

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.