Which layer of earth is the most unique in mechanical composition

Guard cells control which event? the growth of plants capture of solar energy gas exchange in leaves water absorption in roots

What is the starting point in replication called

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