FIGURE 12-6 A, Anterior view of the skull. After coloring the diagram, label the specific structures noted on the lines provided and on the blanks in the Lab Report at the end of this exercise.

1. in what ways have non-native species been beneficial? 2. what are some of the hypotheses for the collapse of honeybee colonies? 3. distinguish between regional and functional extinction. 4. why is it difficult to measure background extinction rates? 5. what three factors are most important in causing extinction rates to climb?