According to theories concerning the origin of life, the atom shown is a likely choice for the basic element of all livings things because it a)is small and unstable. b)is relatively stable and can form four covalent bonds. c)forms four ionic bonds with other elements and itself. d)is large and takes up enough space to fill the structure of a cell.

Patient has just received an organ transplant which treatment would be most effective in preventing the patient’s body from

9. what area of study applies scientific findings to create ways for solving problems or improving life? a biogeology b mathematics c manufacturing d engineering

Which of the following statements best distinguishes a hypothesis from a theory? a. theories are hypotheses that have been proved. b. hypotheses are guesses; theories are correct answers c. hypotheses usually are relatively narrow in scope; theories have broad explanatory power. d. theories are proved to be true; hypotheses are often contradicted by experimental results.