From where do the placenta and umbilical cord develop? outer cells of the blastocyst
inner cells of the blastocyst
directly from the uterus
directly from the ovary

Ya um forget the human body let’s give our students “ s 3 x e d “

What are four key elements of the study of economics?

Most of the carbon on earth is stored in the form of

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