contestada

Ned is designing an experiment to test which hand sanitizer kills the most E. coli bacteria. In order for Ned's results to be valid, what must he do?

Respuesta :

kerrisweatman
Have a control. You have to have something to compare your experimental results or else your results could be random chance. 

mccsstudent
test the hand sanitizers on bacterial colonies that are kept in the exact same environmental conditions, such as temperature and light level

Otras preguntas