All of the above are needed. Nucleotides are the basic building blocks of new DNA, ATP energy is needed because replication is an active process, and enzymes catalyze the reactions needed to carry it out (e.g. helicase to separate the strands to be replicated, DNA polymerase to build the new strands, and ligase to "glue" the fragments together).
Glucose and oxygen!!!
CO2 + Water in the presence of sunlight results in glucose + oxygen
C. <span>The duodenum is a separate anatomic structure. It is the first part of the small intestine after the stomach. </span>
