Avery and his group used enzymes to degrade DNA, RNA and protein in 3S bacteria. DNA from those cells was then tested to see if it can convert 3R cells into 3S cells. It was observed that 3R cells were converted to 3S cells except when the DNA was destroyed. Thus, DNA was pin-pointed as the transforming agent.
The independent variable in the given experiment in testing the hypothesis is the pixie sticks as it could stand independently, without having to rely to another variable. The dependent variable is determining the reading speed of which this will be dependent on the independent variable in showing its effect or result.
There wasn’t a specific type of people or person. Christianity spread from southern europe to northern europe from merchants, missionaries and even soldiers traveling and teaching.