Living in the Environment 18th Edition by Tyler Miller,Scott Spoolman

Exercise 5

The following table is a sample of a very large body of data reported by R. A. Alford and S. J. Richards in their book Extinction in our Times-Global Amphibian Decline. It compares various areas of the world in terms of the number of amphibian species found and the number of amphibian species that were endemic, or unique to each area. Scientists like to know these percentages because endemic species tend to be more vulnerable to extinction than do nonendemic species. Study the table below and then answer the questions that follow it.

Fill in the fourth column to calculate the percentage of amphibian species that are endemic to each area.