It takes several to develop a specific immune reaction against an invading organism minutes weeks months days hours

In this experiment, the was intentionally manipulated. it is the independent variable. the dependent variables that were measured were the

You see a white marker with an orange circle and black lettering. what does this marker tell you

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