Which one f the following measurements involve a direction?
a. distance
b. velocity
c. mass
d. acceleration

Use the drop-down menus to label each of the following changes p for physical change and c for chemical change.

Which of the following best describes the purpose of technology?

Jason adds the antibiotic penicillin to a bacterial culture. the bacteria develop genetic modifications in their genome, which gives them resistance to the antibiotic penicillin. what caused this genetic modification?