State one of the most important ways in which ecologic studies differ from other observational study designs used in epidemiology. what is meant by the ecologic fallacy? using your own ideas suggest a possible design for an ecologic study; how might the study design be affected by the ecologic fallacy?

What is involved in redox reactions

What is the difference between the conducting zone and the respiratory zone of the respiratory system? the conducting zone is a series of cavities and tubes that move air to the respiratory zone where gases exchange with the bloodstream. the conducting zone exchanges gases between the lungs and the alveoli and the respiratory zone is a series of cavities and tubes that move air to the conducting zone. the conducting zone moves oxygen into the cells and the respiratory zone takes carbon dioxide away from the cells. the conducting zone moves oxygen into the bloodstream and the respiratory zone takes carbon dioxide away from the bloodstream.

What is the difference between how ionic and covalent bonds form