The sequence of nitrogenous bases in DNA varies widely. The sequence of the bases in DNA is most important for which of the following?

I'm not sure what the choices are, but the answer would be the coding for amino acids/genes/traits. See if you can find something along those lines. Let me know if you need a little more help :)

lizards have adapted to life in the desert. some desert lizards have toes with spiny scales to them run across the sand without sinking. some use the sand to hide from predators, or to search for small animals that they prey upon.

the answer is b.) hydrogen bonds between bases.