Which of the following in the box to the right side go in the Purines, Pyrimidines and both section of the Venn diagram?

Pyrimidines: adenosine, guanine, two rings structure

Purines: thymine, cytosine, one ring structure

Both sections: the rest

Explanation:

As you can see in the picture, both purines and pyrimidines have their characteristic structure.

Deoxyribose and phosphate group would be in middle because both types of nitrogen bases have to be able to make a nucleotide = nitrogen base + deoxyribose + phosphate group.

Hope this will help :)

well, that's easy; the answer's c, "it reduces contamination of the water and substrate of the estuary."