Each of the following is a contribution of the Shang Dynasty except... a
a calendar based on the sun and moon

b
a picture-based writing system

c
decorative bronze vessels

d
fine gold jewelry

Dna, in the nucleus carries the genetic code for making proteins in ribosomes. in the diagram, b, represents the proteins produced. dna cannot leave the nucleus to carry the genetic information to the ribosome where proteins are produced. how does the genetic code get from the nucleus to the ribosome? what does a represent? now