What is the role of the gall bladder

As a small change in a person's dna can cause a genetic disorder

And give a detailed description! scientist observes the boundary between two tectonic plates for a decade and finds that no new volcanoes have formed over the course of her investigation. does this result support the theory of plate tectonics? why or why not?

In the diagram below, the northern hemisphere would be in what season at position a a.fall b. winter c.summer d.spring