What is the structure that forms the shell and houses the gills for mollusca

Can someone i have no idea of how to do this.

Hemoglobin is a proton that carries oxygen around your body what is hemoglobin made from

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