Which best summarizes the scientific process that led to our current understanding of DNA? Each scientist made an important, but unrelated, contribution.
Scientists built on the previous work of other scientists to make new discoveries.
Most of the discoveries were made by chance and did not depend on prior knowledge.
The most important contributions were made within the same time period of the late 1800s.

Calculate the ratio of h+ ions to oh– ions at a ph = 7. find the concentration of h+ ions to oh– ions listed in table b of your student guide. then divide the h+ concentration by the oh– concentration. record this calculated ratio in table a of your student guide. compare your approximated and calculated ratios of h+ ions to oh– ions at a ph = 7. are they the same? why or why not? record your comparison in table a. what is the concentration of h+ ions at a ph = 7? mol/l what is the concentration of oh– ions at a ph = 7? mol/l what is the ratio of h+ ions to oh– ions at a ph = 7? : 1