Aprediction of the theory of plate tectonics is that new volcanoes can form at the boundary of two plates as magma seeps between them. to test this hypothesis, a scientist makes a map of existing volcanoes along a tectonic plate and measures the number of new volcanoes that appear over a decade. what would be the expected result of the experiment? how would you interpret the results if the scientist observes no new volcanic activity?

Plate Boundaries (earthquakes and volcanoes)

-Plate boundary: where two plates join  

-Plates might move toward each other at boundary, away from each other or alongside each other

In other words, most of the world's active volcanoes are located along or near the boundaries between shifting plates and are called "plate-boundary" volcanoes. However, some active volcanoes are not associated with plate boundaries, and many of these so-called "intra-plate" volcanoes form roughly linear chains in the interior of some oceanic plates. You shouldn't see a expected result when looking for one in an experiment. Interpreting the results would leave you a negative. A prediction can come and go. Fault lines change, and so can mother-nature.

If it's not useful, feel free to report for mistake in answer. -_-

you know they are heterozygous for a trait because they have it as jj or jj.