During a murder investigation, the medical examiner tests the contents of the victim’s stomach to try to identify their last meal and establish a connection to a suspect. The contents tested using Lugol’s iodine turned a dark purple color which indicates the presence of starch. This test indicates which of these macromolecules was present in the victim’s last meal?

Which experiment would most likely contain experimental bias

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

Select the situation bellow that would produce a total displacement of zero. a. a trip to the moon and then to mars b. a horse galloping from one end of a field to another c. the criss-crossing path of a bug as it flies from flower to flower d.a round-trip ride to school and back