Mesopotamia?? I'm not quite sure this is a biology question.
Answer:
Eukaryotes have solved the end-replication problem by locating highly repeated DNA sequence at the end, or telomeres, of each linear chromosome.
Explanation:
Telomeres are stretches of DNA at the ends of the chromosome, They protect the genetic data and make it possible for cells to divide.
How a bridge is built at the base can affect how far it can extend.
The answer is “ COVALENT BOND”
Nucleotide would be the answer