Capillaries reach every ___ in the body

How did the research presented in the article affect scientists' understanding of the evolution of eukaryotes

In dna, only the_ varies from one nucleotide to another. base phosphate sugar amino acid

1) what three conditions must be present for minerals to form through natural processes? 2) why are minerals considered inorganic substances? 3) how do oxides differ from other minerals that contain oxygen atoms? 4) how is a sulfide different from a sulfate? what makes native elements unique?