The main difference between the four nucleotides that make up DNA is that they have differentRequired to answer. Single choice.

bases.

Explanation:

Nucleotides are the basic building blocks that make up DNA, consisting of a deoxyribose sugar, phosphate group, and nitrogenous base. The main difference between the four nucleotides is the nitrogenous base, Adenine, Thymine, Guanine, or Cytosine. Adenine pairs with Thymine, and Guanine pairs with Cytosine. The order in which these pairs come in code for proteins and hold genetic information.

x would be the most and the least would be y because there are more fruit   and seeds than flock z has insects

allowed for the prediction of the properties of missing elements.