How many bacterial restriction enzymes are there available to scientists? A. 2,000
B. 20,000
C. 20
D. 200

People who exercise for an hour may have lower cholesterol levels. is that a statement? a law? or a hypothesis?

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?

How have high taxes on tobacco products impacted the number of people who use them? a. the number of tobacco users has increased. b. the number of tobacco users has decreased. c. the number of tobacco users has not changed. d. the number of adolescent tobacco users decreased, while the number of adult users increased