You can be infected with a virus and not even know it.
a. true
b. false

Researchers randomly divide participants into groups. each group takes a different amount of omega-3 fatty acid supplements daily for a month. one group receives a placebo. the researchers measure the impact on cholesterol levels in the blood. what is the purpose of random assignment in this experiment? a, to produce treatment groups with similar characteristics b, to ensure that all people with high cholesterol have an equal chance of being selected for the study c, to increase the accuracy of the research results and prevent skewness in the data

Imagine ? person stepping on a pin and pulling his or her foot way look at the réfléchir arc of the scenarios below

Rue or false siblings look simila rbecause they each have some traits of their parents.