Using the four components of natural selection, explain how PCB resistance became so common among the tomcod in the Hudson. Be sure to state yourclaim, provide
evidence from prior knowledge, and justify your reasoning.

Do you think the gene eef1 alpha1 supports cell theory? explain your response.

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

What kinds of molecules can pass through the cell membrane without any problem?