How can you safely experiment with plants during a scientific investigation?
a. wash hand after handling them
b. never eat or taste them
c. both of the above

I would think the answer is c.

B never eat or taste them because sometimes the plant may be dangerous

what experimental evidence led scientists to change from the previous model to this one?

a few of the positive particles aimed at a gold foil seemed to bounce back.

the colors of light emitted from heated atoms had very specific energies.

experiments with water vapor showed that elements combine in specific proportions.

cathode rays were bent in the same way whenever a magnet was brought near them.