D iş the answer...........
Answer:
DNA structure DNA is made up of molecules called nucleotides. Each nucleotide contains a phosphate group, a sugar group and a nitrogen base. The four types of nitrogen bases are adenine (A), thymine (T), guanine (G) and cytosine (C).
Explanation:
Bacteria
Amphibians
Reptiles
Mammals
Because it is harder to get the sugars out of complex carbohydrates and easier to get sugars out of simple sugars hence the name.
