Populations of a plant species have been found growing in the
mountains at altitudces above 2,500 meters. Populations of a plant
that appears similar, with slight differences, have been found in
the same mountains at altitudes below 2,300 meters.

a. Describe TWO kinds of data that could be collected to provide
a direct answer to the question, do the populations growing above
2,500 meters and the populations growing below 2,300 meters
represent a single species?

b. Explain how the data you suggested in part (a) would provide
a direct answer to the question.