How do nurse researchers strive for constancy of conditions in implementing a treatment?

C, h, o - elements that are common to biomolecules. if the biomolecule in question is a protein these elements also combine with nitrogen. which molecule below is a protein?

What does gradualism and punctuated equilibrium have in common

In the african savanna, more wildebeests are born than the environment can support. which is most likely to happen over a period of years as a result