The double helix of dna is composed of building blocks called

Describe the response the kidneys have to dehydration and excessive water intake. what happens to the concentration of urine in each case ?

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?

If jane has the blood type ab and marries john who has type o blood what are the possible phenotypes of their first kid?