Hello I am Iron-60 , the twin of Iron-56, how am different than my twin?

Which statement is true about the cell theory? a) it is well-supported by evidence. b) it is unchangeable and permanent.

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?

What occurs to the cell during mitosis