Emerging viruses arise by a. mutation of existing viruses. b. the spread of existing viruses to new host species. c. the spread of existing viruses more widely within their host species. d. all of the above e. none of the above
BSC 2010 Lecture Notes Week One and Two I. Biology A. Study of living things Understand big picture B. organismorganstissuecellsmoleculesatoms atoms made up of nucleus 1. protons and neutrons in nucleus 2. positively charged electrons are negatively charged and surround nucleus elements are composed of only 1 kind of atom 1. most common elements: Carbon, Hydrogen, oxygen, Sulfur, Nitrogen, and Phosphorous atomic number is the number of protons atomic mass is the number of protons added to number of neutrons
