During the 1950's, several scientists were responsible for discovering the structure of dna. one scientist, erwin chargaff, found that in dna, the ratios of adenine (a) to thymine (t) and guanine (g) to cytosine (c) are always equal. which model best represents chargaff's rule?

the answer is D for USA TEST PREP. This is deal with just DNA no RNA, So every goes to each other like normal. and it shows how every things equals each other

you did not attach the discourse, but i assume it to be the discourse on the origin and basis of inequality among men (the original titile in french is: "discours sur l'origine et les fondements de l'inégalité parmi les hommes"), also know as "second discourse". in this discourse, jean-jacques rousseau emphasizes that private property is the basis of all inequalities.

therefore, what enabled the old regime to maintain as long as it did was private property.

answer:   option a) glucagon was secreted by his pancreas before he ate the cookies because blood glucose was low. insulin was secreted after he ate the cookies because his blood glucose was high.

explanation: